Abstract: ACARS, namely Aircraft Communication Addressing and Reporting System, is a digital data link system that transmits short messages between aircraft and ground station by radio. ACARS message contains a lot of important internal data, but the current ACARS message is directly transmitted without any processing, which will bring a variety of problems affecting the security of the system. For example, people can easily use the corresponding radio transceiver to obtain, monitor and even process ACARS message information, so as to obtain internal data, leading to data leakage. In order to ensure the data security of ACARS, domestic password is used to realize encryption. Real ACARS data is used to test, and the results show that the encryption method in this paper can achieve the purpose of data security and privacy protection of ACARS data link[1]. In this experiment, two national secret algorithms SM2 and SM4 are used to realize the encryption and decryption of ACARS message, which ensures the further improvement of the security of ACARS.

Key words: ACARS, SM2, SM4, encryption, decryption, data security

摘要： ACARS系统即飞机通信寻址与报告系统，是一种在航空器和地面站之间通过无线电传输短消息的数字数据链系统。ACARS报文中包含许多重要的内部数据，但当前的ACARS报文未经过任何处理直接进行传输，这就会带来各种影响系统安全性的问题，比如人们可以很轻松地使用相应的无线电收发设备来获取、监控甚至处理ACARS报文信息，从而获得内部数据，导致数据泄露。为了保障ACARS的数据安全，采用国产密码实现----加密。采用真实的ACARS数据进行测试，结果表明本文的加密方法可以实现ACARS数据链的数据安全和隐私保护的目的。本实验方案分别采用了两种国密算法SM2和SM4，实现了ACARS报文的加解密，确保了ACARS系统安全性的进一步提高。 

关键词: ACARS, SM2, SM4, 加密, 解密, 数据安全