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Journal of Information Security Reserach    2023, 9 (E1): 105-.   Abstract （394）      PDF （1450KB）（200）       Knowledge map    Save Reference | Related Articles | Metrics

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Research on Privacy Protection Technology in Federated Learning Journal of Information Security Reserach    2024, 10 (3): 194-.   Abstract （178）      PDF （1252KB）（205）       Knowledge map    Save In federated learning, multiple models are trained through parameter coordination without sharing raw data. However,  the extensive parameter exchange in this process renders the model vulnerable to threats not only from external users but also from internal participants. Therefore, research on privacy protection techniques in federated learning is crucial. This paper introduces the current research status on privacy protection in federated learning. It classifies the security threats of federated learning into external attacks and internal attacks.Based on this classification,  it summarizes external attack techniques such as model inversion attacks, external reconstruction attacks, and external inference attacks, as well as internal attack techniques such as poisoning attacks, internal reconstruction attacks, and internal inference attacks. From the perspective of attack and defense correspondence, this paper summarizes data perturbation techniques such as central differential privacy, local differential privacy, and distributed differential privacy, as well as process encryption techniques such as homomorphic encryption, secret sharing, and trusted execution environment. Finally, the paper analyzes the difficulties of federated learning privacy protection technology and identifies the key directions for its improvement. Reference | Related Articles | Metrics

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Security Risks and Countermeasures to Artificial Intelligence#br# #br# Journal of Information Security Reserach    2024, 10 (2): 101-.   Abstract （139）      PDF （469KB）（211）       Knowledge map    Save Related Articles | Metrics

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Research and Practice on Product Security Governance Journal of Information Security Reserach    2023, 9 (12): 1218-.   Abstract （138）      PDF （2479KB）（85）       Knowledge map    Save This paper studies how to ensure that suppliers deliver secure and trustworthy products and services from the perspective of product security governance. First, this paper introduces the context of product security, gives the definition and objectives of product security, and proposes that product security is a security governance problem. Then this paper establishes the organizational structure of product security governance based on the threeline model, describes the roles and responsibilities of each organizational unit, and solves the problems of separation of duties and conflicts of interest from the organizational structure. Next this paper introduces the concept, framework, system and implementation approaches of product security policies, and establishes the toplevel requirements of product security system construction. Finally, the contribution of this paper is summarized and the research direction for the next step is pointed out. These research results have been applied in ZTE’s product security practices and have achieved good governance effects. Reference | Related Articles | Metrics

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Android Malware Multiclassification Model Based on Transformer Journal of Information Security Reserach    2023, 9 (12): 1138-.   Abstract （136）      PDF （2073KB）（133）       Knowledge map    Save Due to the open source and openness, the Android system has become a popular target for malware attacks, and there are currently a large number of research on Android malware detection, among which machine learning algorithms are widely used. In this paper, the Transformer algorithm is used to classify and detect the grayscale images converted by Android software classes.dex files, and the accuracy rate reaches 86%, which is higher than that of CNN, MLP and other models. Reference | Related Articles | Metrics

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The Status and Trends of Confidential Computing Journal of Information Security Reserach    2024, 10 (1): 2-.   Abstract （121）      PDF （1466KB）（157）       Knowledge map    Save Related Articles | Metrics

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Malicious Client Detection and Defense Method for Federated Learning Journal of Information Security Reserach    2024, 10 (2): 163-.   Abstract （119）      PDF （806KB）（109）       Knowledge map    Save Federated learning allows participating clients to collaborate in training machine learning models without sharing their private data. Since the central server cannot control the behavior of clients, malicious clients may corrupt the global model by sending manipulated local gradient updates, and there may also be unreliable clients with low data quality but some value. To address the above problems, this paper proposes FedMDD,a defense approach for malicious client detection and defense for federated learning, to process detected malicious and unreliable clients in different ways based on local gradient updates, while defending against symbol flipping, additive noise, single label flipping, multilabel flipping, and backdoor attacks. Four baseline algorithms are compared for two datasets, and the experimental results show that FedMDD can successfully defend against various types of attacks in a training environment containing 50% malicious clients and 10% unreliable clients, with better results in both improving model testing accuracy and reducing backdoor accuracy. Related Articles | Metrics

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Vulnerability Mining and Threat Detection Journal of Information Security Reserach    2023, 9 (10): 930-.   Abstract （115）      PDF （510KB）（132）       Knowledge map    Save Related Articles | Metrics

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A Network Intrusion Detection Model Integrating CNN-BiGRU and  Attention Mechanism Journal of Information Security Reserach    2024, 10 (3): 202-.   Abstract （113）      PDF （2042KB）（141）       Knowledge map    Save To enhance the feature extraction capabilities and classification accuracy of the network intrusion detection model, a network intrusion detection model integrating CNNBiGRU (Convolutional Neural NetworkBidirectional Gated Recurrent Unit) and attention mechanism is proposed. CNN is employed to effectively extract nonlinear features from traffic datasets,while BiGRU extracts timeseries features. The attention mechanism is then integrated to differentiate the importance of different types of traffic data through weighted means, thereby improvingthe overall performance of the model in feature extraction and classification. The experimental results indicate that the overall accuracy rate is 2.25% higher than that of the BiLSTM (Bidirectional Long ShortTerm Memory) model. Kfold crossvalidation results demonstrate that the proposed model's good generalization performance, avoiding the occurrence of overfitting phenomenon, and affirming its effectiveness and rationality. Reference | Related Articles | Metrics

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Malicious TLS Traffic Detection Based on Graph Representation#br# #br# Journal of Information Security Reserach    2024, 10 (3): 209-.   Abstract （113）      PDF （1728KB）（106）       Knowledge map    Save Owing to the need for privacy protection, encryption services online are becoming increasingly popular. However, this also provides an avenue for malicious traffic to hide itself. As a result, the identification of encrypted malicious traffic has become an important task for network management. Currently, some mainstream techniques based on machine learning and deep learning have achieved good results. However, most of these methods ignore the structure of traffic and do not provide indepth analysis of encryption protocols. To address this problem, this paper proposes a graph representation method for SSLTLS traffic, summarizes the key features of TLS traffic and considers traffic correlation from the perspective of multiple attributes such as source IP, destination port and packet count of the flow. Furthermore, this paper establishes a malicious traffic identification framework GCNRF based on graph convolutional neural network and random forest algorithm. This method transforms traffic into graph structure, integrates the structural information and node features of traffic for identification and classification. Experimental results on real public datasets show that the classification accuracy of this method is higher than that of current mainstream models. Reference | Related Articles | Metrics

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Security and Privacy Protection in 6G Network: A Survey Journal of Information Security Reserach    2023, 9 (9): 822-.   Abstract （109）      PDF （1096KB）（124）       Knowledge map    Save The scale of 5G network deployments continues to grow. While there are obvious advantages over 4G network, the limitations of 5G network are emerging, which leads to research on 6G network technologies. The complexity of 6G network and the diversity of 6G’s applications make the security issues of 6G more prominent. Coupled with the fact that 6G frameworks and related technologies are largely in a conceptual state, the security and privacy issues of 6G network are still in the exploratory stage. In this paper we analyzed the current state of 6G security and privacy research at first, and than pointed out the security challenges in 6G network, discussed potential security solutions for 6G network from the aspects of physical layer security, artificial intelligence (AI), distributed ledger technology (DLT), and edge computing, and finally we provided an outlook on future research trends of security and privacy protection in 6G network. Reference | Related Articles | Metrics

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Analysis of Security Blind Area of Large LAN#br# #br# Journal of Information Security Reserach    2024, 10 (4): 335-.   Abstract （103）      PDF （784KB）（90）       Knowledge map    Save This paper proposes the concepts of network blind area, asset blind area and security blind area  as they pretain to the security of large local area networks (LAN).  It analyzes the reasons behind the emergence of these three blind area, describes their forms, and points out their impacts on the security of large LAN. This paper proposes a new perspective for solving the security issues associated with large LAN. Reference | Related Articles | Metrics

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Survey of Intelligent Vulnerability Mining and Cyberspace Threat Detection Journal of Information Security Reserach    2023, 9 (10): 932-.   Abstract （102）      PDF （1093KB）（115）       Knowledge map    Save At present, the threat of cyberspace is becoming more and more serious. A large number of studies have focused on cyberspace security defense techniques and systems. Vulnerability mining technique can be applied to detect and repair vulnerabilities in time before the occurrence of network attacks, reducing the risk of intrusion; while threat detection technique can be applied to threat detection during and after network attacks occur, which can detect threats in a timely manner and respond to them, reducing the harm and loss caused by intrusion. This paper analyzed and summarized the research on vulnerability mining and cyberspace threat detection based on intelligent methods. In the aspect of intelligent vulnerability mining, the current research progress is summarized from several application classifications combined with artificial intelligence technique, namely vulnerability patch identification, vulnerability prediction, code comparison and fuzz testing. In the aspect of cyberspace threat detection, the current research progress is summarized from the classification of information carriers involved in threat detection based on network traffic, host data, malicious files, and network threat intelligence. Reference | Related Articles | Metrics

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Legislative Thinking of Artificial Intelligence Law in the Era of  Generative Artificial Intelligence Journal of Information Security Reserach    2024, 10 (2): 103-.   Abstract （101）      PDF （874KB）（118）       Knowledge map    Save With the technological advancements and widespread adoption of Generative Artificial Intelligence (GAI), the structure of human society has undergone fundamental changes.The development of artificial intelligence technology has brought new risks and challenges. The “Interim Measures for the Management of Generative Artificial Intelligence Services” represents China’s latest exploration achievement in the field of GAI. It emphasizes the dual importance of development and security, advocates for innovation and governance in accordance with the law, and serves as a reference and inspiration for the ongoing legislative process of the Artificial Intelligence Law. Specifically, the Artificial Intelligence Law should consider the adoption of promoting legislative model, reduce the use of normative references in the legislative content, clarify the legislative approach of classification and grading, enhance  international exchanges and cooperation in artificial intelligence, and promote the positive use of science and technology by establishing a more scientific and reasonable toplevel design scheme. Reference | Related Articles | Metrics

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Data Life Cycle Safety Monitoring Method Driven by Big Data Journal of Information Security Reserach    2023, 9 (12): 1226-.   Abstract （100）      PDF （1859KB）（104）       Knowledge map    Save Aiming at the problems of small coverage, low monitoring accuracy and low automation of traditional data monitoring methods, a data lifecycle safety monitoring method driven by large data is put forward, which is based on feature analysis recognition model, content segmentation model, realtime data monitoring model, file analysis retrieval model and user abnormal behavior prediction model to monitor data security risk in realtime. It effectively guarantees the safe flow of data assets. After testing, the overall accuracy of sensitive data collection, sensitive page capture, sensitive flow monitoring and sensitive file parsing under this method is higher than 92%, and the accuracy of user’s sensitive behavior prediction is higher than 93%, which effectively improves the monitoring range and accuracy of sensitive data. Reference | Related Articles | Metrics

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Research on Identity Authentication Technology Based on Block Chain and PKI Journal of Information Security Reserach    2024, 10 (2): 148-.   Abstract （97）      PDF （1573KB）（168）       Knowledge map    Save Public key infrastructure (PKI) is a secure system based on asymmetric cryptographic algorithm and digital certificate to realize identity authentication and encrypted communication, operating on the principle of  trust transmission based on trust anchor. However, this technology has the following problems: The CA center is unique and there is a single point of failure; The authentication process involves a large number of operations, such as certificate resolution, signature verification, and certificate chain verification. To solve the above problems, this paper builds an identity authentication model based on Changan Chain, and proposes an identity authentication scheme based on Changan Chain digital certificate and public key infrastructure. Theoretical analysis and experimental data demonstrate  that this scheme reduces certificate parsing, signature verification and other operations, simplifies the authentication process, and improves the authentication efficiency. Reference | Related Articles | Metrics

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Journal of Information Security Reserach    2023, 9 (E2): 2-.   Abstract （96）      PDF （361KB）（86）       Knowledge map    Save Related Articles | Metrics

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Journal of Information Security Reserach    2023, 9 (E2): 13-.   Abstract （95）      PDF （1022KB）（135）       Knowledge map    Save Reference | Related Articles | Metrics

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Research on Locally Verifiable Aggregate Signature Algorithm Based on SM2 Journal of Information Security Reserach    2024, 10 (2): 156-.   Abstract （90）      PDF （983KB）（104）       Knowledge map    Save The SM2 algorithm is based on the elliptic curve cryptosystem, which was released by the State Cryptography Administration in 2010. At present, it is widely used in egovernment, medical care, finance and other fields. Among them, digital signature is the main application of SM2 algorithm, and the number of signature and verification operations generated in various security application scenarios has increased exponentially. Aiming at the problem that massive SM2 digital signatures occupy a large storage space and the efficiency of verifying signatures one by one is low. This paper proposes a partially verifiable aggregate signature scheme based on the national secret SM2 algorithm, which uses aggregate signatures to reduce storage overhead and improve verification efficiency. On the other hand, when the verifier only needs to verify the specified message and the aggregated signature, it must also obtain the plaintext of all the messages at the time of aggregation. Using partially verifiable signatures, the verifier only needs to specify the message, aggregate signature and short prompt to complete the verification. Analyze the correctness and security of this scheme. Through experimental data and theoretical analysis, compared with similar schemes, this scheme has higher performance. Reference | Related Articles | Metrics

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Research on Source Code Vulnerability Detection Based on BERT Model Journal of Information Security Reserach    2024, 10 (4): 294-.   Abstract （90）      PDF （3199KB）（120）       Knowledge map    Save Techniques such as code metrics, machine learning, and deep learning are commonly employed in source code vulnerability detection. However, these techniques have problems, such as their inability to retain the syntactic and semantic information of the source code and the requirement of extensive expert knowledge to define vulnerability features. To cope with the problems of existing techniques, this paper proposed a source code vulnerability detection model based on BERT(bidirectional encoder representations from transformers) model. The model splits the source code to be detected into multiple small samples, converted each small sample into the form of approximate natural language, realized the automatic extraction of vulnerability features in the source code through the BERT model, and then trained a vulnerability classifier with good performance to realize the detection of multiple types of vulnerabilities in Python language. The model achieved an average detection accuracy of 99.2%, precision of 97.2%, recall of 96.2%, and an F1 score of 96.7% across various vulnerability types. This represents a performance improvement of 2% to 14% over existing vulnerability detection methods. The experimental results showed that the model was a general, lightweight and scalable vulnerability detection method. Reference | Related Articles | Metrics

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Intelligent Fuzzy Testing Method Based on Sequence Generative Adversarial Networks Journal of Information Security Reserach    2024, 10 (6): 490-.   Abstract （89）      PDF （2426KB）（138）       Knowledge map    Save The increase in the number of vulnerabilities and the emergence of a large number of highly dangerous vulnerabilities, such as supercritical and highrisk ones, pose great challenges to the state of network security. As a mainstream security testing method, fuzz testing is widely used. Test case generation, as a core step, directly determines the quality of fuzz testing. However, traditional test case generation methods based on pregeneration, random generation, and mutation strategies face bottlenecks such as low coverage, high labor costs, and low quality. Generating highquality, highly available, and comprehensive test cases is a difficult problem in intelligent fuzz testing. To address this issue, this paper proposes an intelligent fuzz testing method based on the sequence generation adversarial network (SeqGAN) model. By combining the idea of reinforcement learning, the test case generation is abstracted as a learning and approximate generation problem for universally applicable variablelength discrete sequence data. Innovatively, a configurable embedding layer is added to the generator part to standardize the generation, and a reward function is designed from the dimensions of authenticity and diversity through dynamic weight adjustment. This ultimately achieves the goal of automatically and intelligently constructing a comprehensive, complete, and usable test case set for flexible and efficient intelligent fuzz testing. This paper verifies the proposed scheme from two aspects of effectiveness and universality. The average test case pass rate of over 95% and the average target defect detection rate of 10% under four different testing targets fully demonstrate the universality of the scheme. The 98% test case pass rate, 9% target defect detection rate, and the ability to generate 20000 usable test cases per unit time under four different schemes fully demonstrate the effectiveness of the scheme. Reference | Related Articles | Metrics

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Journal of Information Security Reserach    2023, 9 (E1): 4-.   Abstract （89）      PDF （1410KB）（91）       Knowledge map    Save Reference | Related Articles | Metrics

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Research on the Security Architecture of Artificial Intelligence  Computing Infrastructure Journal of Information Security Reserach    2024, 10 (2): 109-.   Abstract （88）      PDF （1146KB）（119）       Knowledge map    Save The artificial intelligence computing infrastructure is a crucial foundation for the development of artificial intelligence. However, due to its diverse attributes, complex nodes, large number of users, and vulnerability of artificial intelligence itself, the construction and operation of artificial intelligence computing infrastructure face severe security challenges. This article analyzes the connotation and security development background of artificial intelligence computing infrastructure, proposes a security architecture for artificial intelligence computing infrastructure from three aspects: strengthening its own security, ensuring operational security, and facilitating security compliance. It puts forward development suggestions aiming to provide methodological ideas for the security construction of artificial intelligence computing infrastructure, offer a basis for selection and use of safe artificial intelligence computing infrastructure, and provide decisionmaking reference for the healthy and sustainable development of the artificial intelligence industry. Reference | Related Articles | Metrics

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Face Recognition Privacy Protection Method Based on Homomorphic Encryption#br# Journal of Information Security Reserach    2023, 9 (9): 843-.   Abstract （87）      PDF （1144KB）（88）       Knowledge map    Save With the development and application of big data, biometric recognition technology has developed rapidly and has been widely used in new authentication technology. Because the traditional biometricbased identity authentication is mostly carried out in plaintext, and the user’s privacy cannot be adequately guaranteed, this paper proposes and designs a face recognition privacy protection method based on homomorphic encryption technology based on the above defects. This method firstly uses the current popular authentication model FaceNet to extract the user’s biometric information, and then encrypts the extracted feature information with the help of RLWE based homomorphic encryption technology to ensure that when the biometric information is outsourced to the server for distance calculation, the user’s private data will not be disclosed and the server will not snoop on the user’s behavior. At the same time, in the process of identity authentication, the concept of random number is introduced to prevent illegal users from replaying attacks on the server.Experiments show that the method can still ensure high accuracy and feasibility in the state of ciphertext. Reference | Related Articles | Metrics

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Research and Practice of Government Data Security Governance System Journal of Information Security Reserach    2023, 9 (9): 900-.   Abstract （86）      PDF （4365KB）（100）       Knowledge map    Save Critical data is an important engine that keeps organizations and societies going, which makes it a target for malicious hackers, a target for intense scrutiny by regulators, and a need to prevent employees from inadvertently disclosing secret internal information. As the “guardian” to maintain the order of data opening and ensure data security, government departments should not only protect the security of sensitive data, maintain regulatory compliance, but also quickly deploy and implement data security protection projects without changing the existing business processes, and effectively control costs and reduce complexity and risks. This paper starts from the background of government data security governance, through the analysis of the government data security management status and security management needs, refer to the latest data security governance theory and technology research results at home and abroad, according to the relevant policies, laws and regulations, based on the security needs under the background of information technology application innovation, puts forward the framework of the system which applies to the security governance of government affairs data in our country, introduces the related technologies and project practice case. Reference | Related Articles | Metrics

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Generative Fake Speech Security Issue and Solution#br# #br# Journal of Information Security Reserach    2024, 10 (2): 122-.   Abstract （86）      PDF （1170KB）（96）       Knowledge map    Save The development of generative artificial intelligence algorithms has made the generation of fake speech increasingly natural and fluid, making it challening for human listeners  to distinguish the genuine and fake speech. This paper firstly analyzes a series of threats to society posed by the improper abuse of generative fake speech, including an increase in telecommunication fraud, a decline in the security of voiceoperated applications, judicial fairness of forensic identification, and deception to the public through the combination of falsified information across various domains. Subsequently, the paper summarizes and classifies the algorithms of fake speech generation and fake speech detection technology from the perspective of technology development. We explains the procedural aspects of the technologies and their key points, along with an analysis of the challenges encountered in the process of application. Finally, this paper outlines strategies to prevent and address these security issues from four aspects: technical application, institutional regulation, public education and international cooperation. Reference | Related Articles | Metrics

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Research on the Practice of DevSecOps in the Construction of  Digital Government Journal of Information Security Reserach    2023, 9 (12): 1210-.   Abstract （86）      PDF （1906KB）（87）       Knowledge map    Save As an important carrier of data, government business systems are often the most important targets of attack, and government security construction pays more attention to compliance requirements, ensuring business operation through security products and services, while application endogenous security is ignored. In order to adapt to the high security requirements of the current digital government and meet the current scenario of intensive digital government construction, it is necessary to shift security to the left and focus on supply chain and application endogenous security. The government’s information project construction model needs to prioritize development work, and security needs to be closely integrated with the research and development process. DevSecOps, as an emerging security development model, has entered the field of digital government application development. The application development security system enabled by DevSecOps can improve the development process, reduce security repair costs, shorten development cycles, and greatly enhance the level of digital government security. Reference | Related Articles | Metrics

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Research on Malicious Behavior Detection and Identification Model  Based on Deep Learning Journal of Information Security Reserach    2023, 9 (12): 1152-.   Abstract （85）      PDF （1897KB）（74）       Knowledge map    Save In order to identify and prevent abnormal behavior and malicious intrusion in networks, a detection model based on Convolutional Neural Network (CNN) and Bidirectional Long ShortTerm Memory (BiLSTM) networks was constructed and applied to various types of Intrusion Detection Systems (IDS). Distinguished from traditional detection models, which suffer from reduced performance due to data redundancy, this model initially feeds the features into a CNN to generate feature mappings, effectively reducing the parameters of the recognition network and automatically eliminating redundant and sparse features. Subsequently, the processed features are used as inputs to the BiLSTM network to detect and recognize malicious behavior within the network. Finally, test results on the NSLKDD and KDD CUP99 datasets demonstrate that the proposed model surpasses existing models in terms of both time efficiency and accuracy, confirming its effectiveness in detecting malicious behavior and accurately classifying network anomalies. Reference | Related Articles | Metrics

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Journal of Information Security Reserach    2023, 9 (E1): 55-.   Abstract （84）      PDF （1602KB）（59）       Knowledge map    Save Reference | Related Articles | Metrics

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Survey of Research on Key Technologies of Internet Content Security Journal of Information Security Reserach    2024, 10 (3): 248-.   Abstract （83）      PDF （1234KB）（89）       Knowledge map    Save The rapid development of the Internet and easy content creation and sharing have made Internet content security a top priority for Internet construction and supervision. The dramatic increase of information content with text, image, audio, and video as carriers has brought great challenges to Internet content security. Internet content security is rich in connotation, and we focused on four key applications including multimedia content filtering, fake information detection, public opinion perception, and data protection. Then, we summarized key technologies and main research work adopted in those applications. Finally, we discussed and prospected key issues of Internet content security in future research. Reference | Related Articles | Metrics

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Constructing a Secure and Innovative Framework for Digital Financial  Infrastructure Security Based on a Multidimensional Security Perspective Journal of Information Security Reserach    2024, 10 (4): 290-.   Abstract （81）      PDF （865KB）（99）       Knowledge map    Save Related Articles | Metrics

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Research on Location Attack Detection of VANET Based on Incremental Learning Journal of Information Security Reserach    2024, 10 (3): 277-.   Abstract （80）      PDF （1866KB）（79）       Knowledge map    Save In recent years, deep learning has been widely employed in the detection of malicious position attacks on vehicles. However, deep learning models necessitate extensive training time and possess a large number of parameters. Detection methods based on deep learning lack scalability and cannot accommodate the needs of continuously generated new data in vehicular networks. To address these issues, this paper innovatively introduces incremental learning algorithms into the detection of malicious position attacks on vehicles to solve the above problems.This approach first extracts key features from the collected vehicle information data. Subsequently, a malicious position attack detection system is constructed, utilizing ridge regression to quickly approximate the vehicular network’s malicious position attack detection model. Finally, the incremental learning algorithm is applied to update and optimize the malicious position attack detection model to adapt to newly generated data in the vehicular network.Experimental results demonstrate that this method surpasses other methods such as SVM, KNN, and ANN in terms of performance. It can swiftly and progressively update and optimize the old model, thereby enhancing the system’s detection accuracy for malicious position attack behaviors. Reference | Related Articles | Metrics

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Power Sensitive Data Access Control Method Based on Zero Trust Security Model Journal of Information Security Reserach    2024, 10 (1): 88-.   Abstract （77）      PDF （1686KB）（79）       Knowledge map    Save In order to protect the security of power sensitive data, the access control method of power sensitive data based on zerotrust security model was proposed, aiming at the problem of large amount of leakage of power sensitive data caused by the difficulty of data access control and the increase of data theft in big data environment. Based on the zerotrust security model, this paper collected the trust factors of users’ access behavior, constructed the zerotrust security model, decomposed the trust attributes by using the hierarchical decomposition model, constructed a judgment matrix based on the weight distribution method to calculate the trust value of users’ access behavior, and combined the adaptive mechanism and the time decay algorithm to improve the update and record of the trust value. The hierarchical growth decision tree is used to classify the access of power sensitive data. On the basis of user authentication, signcryption parameters are set, and public and private keys are used to sign the access authentication information. The experimental results showed that this method can effectively suppress the vicious data access behavior, and the data encryption time overhead was low, the average time overhead was less than 1.4s1200, and the access control error rate was less than 5%. The overall control effect reached the ideal standard. Reference | Related Articles | Metrics

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Privacy Measures for Secure Multiparty Computing Applications Journal of Information Security Reserach    2024, 10 (1): 6-.   Abstract （77）      PDF （790KB）（96）       Knowledge map    Save The privacy protection ability of secure multiparty computing application to input information depends on the underlying security mechanism on the one hand, and on the other hand depends on the task functions. At present, the research on secure multiparty computing mainly focuses on the security mechanism to prevent information leakage in the process of computing. However, there are few studies on the measure of task functions’ ability to protect the input information of the participants. The problem that each participant of the task function deduces the input information of other participants through the legitimate input and output cannot be prevented by the security mechanism of secure multiparty computing, so the measurements of the privacy protection power of the task function are related to the concrete implementation and application of secure multiparty computing schemes. In this paper, according to the information entropy model, the concepts of average entropy and specific entropy are defined from the point of view of the attacker, and a method to calculate information benefits is proposed. Then, the privacy protection strength of the specific application scheme of secure multiparty computing schemes is measured by calculating the ideal privacy loss of the objective function and the actual privacy loss of the actual secure multiparty computing application. Reference | Related Articles | Metrics

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Journal of Information Security Reserach    2023, 9 (E2): 37-.   Abstract （77）      PDF （1790KB）（100）       Knowledge map    Save Reference | Related Articles | Metrics

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Face Spoofing Detection Model with Fusion of Convolutional  Neural Network and Transformer Journal of Information Security Reserach    2024, 10 (1): 25-.   Abstract （75）      PDF （2122KB）（78）       Knowledge map    Save In the field of face antispoofing, the methods based on Convolutional Neural Network (CNN) can learn feature representation with fewer parameters, yet their receptive fields remain local. In contrast, Transformerbased methods offer global perception but entail an impractical volume of parameters and computations, hindering widespread deployment on mobile or edge devices. To address these challenges, this paper proposed a face spoofing detection model that integrates CNN and Transformer, aiming to achieve a balance between the amount of parameters and accuracy while maintaining the ability to extract global and local features. Firstly, local face images are cropped and selected  as input to effectively avoid overfitting. Secondly, the feature extraction module based on coordinate attention is designed. Finally, the fusion of CNN and Transformer modules are designed to extract local and global features of images through localgloballocal information exchange. The experimental results show that the model achieved an accuracy of 99.31% and an average error rate of 0.54% on the CASIASURF (Depth modality) dataset; Moreover zero  error rate is achieved on the CASIAFASD and ReplayAttack datasets, and the model parameters are only 0.59MB, much smaller than the Transformer series models. Reference | Related Articles | Metrics

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Research on the EU Policy on Cyber Defence Journal of Information Security Reserach    2024, 10 (1): 94-.   Abstract （75）      PDF （569KB）（62）       Knowledge map    Save The European Union proposed to formulate a cyber defence policy in 2013 and issued a joint communication on the “EU Policy on Cyber Defence” at the end of 2022, continuously to deepen and implement its cyber defence policy. This paper first summarizes the main points of the joint communication from the aspects of the necessity of jointly carrying out cyber defence, the role of situational awareness in cyber defence, and the promotion of cyber defence cooperation at multiple levels. Then, the characteristics of the EU’s network defense policy are analyzed in depth from the aspects of deepening network defense policies, implementing network defense policies, and collaborating to protect key infrastructure security. Finally, three inspirations and suggestions for strengthening the security of our critical infrastructure are given. Reference | Related Articles | Metrics

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Research on Text Classification Model Based on Federated Learning  and Differential Privacy Journal of Information Security Reserach    2023, 9 (12): 1145-.   Abstract （73）      PDF （2101KB）（83）       Knowledge map    Save As a distributed machine learning framework, federated learning can complete model training without disclosing user data. However, recent attacks have shown that only keeping the locality of data in the training process can not provide sufficient privacy protection. Therefore, in order to address the privacy protection issues during federated learning training, this paper proposes a text classification model based on BERT. This model combines differential privacy (DP) and federated learning (FL) to ensure that the federated model training process is protected from inference attacks during the transfer of federated learning parameters. The final experiment shows that the proposed method can maintain high model accuracy while protecting privacy. Related Articles | Metrics

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Abnormal Traffic Detection Based on Adaptive Integrated Learning Journal of Information Security Reserach    2024, 10 (1): 34-.   Abstract （72）      PDF （1701KB）（59）       Knowledge map    Save We propose an adaptive integratelearningbased anomalous traffic detection method in this paper that uses the discrete Fourier transform to extract the frequency domain features of traffic, resulting in less information loss during the extraction of traffic features. An evaluation metric based on stability and accuracy fluctuations is used to dynamically assess the reliability of the current traffic features, and the feature data blocks that pass the evaluation are used to generate new subclassifiers. Meanwhile, an integrated adaptive classifier is designed, whose parameters and subclassifiers are adjusted in real time according to the current situation. The experimental results show that the method is effective for solving the concept drift problem in anomalous traffic detection and machine learning against attacks. Reference | Related Articles | Metrics

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Zero Trust IAM Architecture Technology Based on Dynamic Risk #br# Assessment Mechanism#br# Journal of Information Security Reserach    2023, 9 (12): 1190-.   Abstract （72）      PDF （2047KB）（49）       Knowledge map    Save In today’s identity authentication and access control technologies, most of them are authorized based on roles, once an attacker obtains the control right of an account corresponding to the role, he can use the role authority of the account to perform malicious operations without further authentication. Based on this defect, this paper proposes a dynamic risk assessment mechanism and algorithm based on the zerotrust architecture. In the user identity authentication stage, the algorithm is used to calculate the authentication factor provided by the user to obtain the user’s data security risk degree value on the Internet, and dynamically control the user’s access according to the data security risk degree value. In the process of access control, blockchain technology and algorithms are used to generate an undeniable and traceable user access label for this access. The experimental results show that the architecture technology can realize dynamic and more secure authentication and access control. Reference | Related Articles | Metrics