关键词: 变色龙哈希, 同态加密, 数据安全更新, 数据流通, 数字版权管理

Abstract: To simultaneously address the demands for data updates and data security management in the field of data circulation, this paper investigates a trusted data security management scheme based on chameleon hash. Initially, the mathematical foundations of chameleon hash are analyzed and three construction methods are compared. A data security management approach that integrates chameleon hash with homomorphic encryption is summarized and applied to digital rights protection. This method not only permits the updating and modification of submitted data but also ensures data security and userfriendliness. Finally, the efficiency of the proposed method is evaluated through experimental simulations. The results demonstrate that the data security management and update method proposed in this paper is suitable for environments requiring frequent data updates and certain security needs. This method effectively reduces the overall cost of data updates, providing an efficient and secure solution for the circulation of data elements.

Key words: chameleon hash, homomorphic encryption, data security updates, data circulation, digital rights management