基于国密SM4算法的ACARS数据链信息加密

Encryption of ACARS data-link communication based on SM4 algorithm

分析了目前ACARS所面临的安全隐患,利用SM4分组对称加密算法对ACARS数据链信息进行加密。针对ACARS数据链的实际报文,对ACARS信息进行有效的载荷编码,将ACARS信息转化为可加密的比特流。利用SM4加密算法对转化的比特流进行加密运算,得到所需的密文,并对SM4加密算法进行验证,分析SM4算法的加密性能以及安全性。实验结果表明通过该加密算法得到的密文不具有可读性,满足ACARS数据链信息安全的标准。

Threat of ACARS data-link is analyzed and ACARS data-link information is encrypted with SM4 packet symmetric encryption algorithm. According to actual messages from ACARS data-link, this method processes ACARS information with an effective load code and transforms the ACARS information into encrypted bit streams. The bit streams are encrypted with SM4 encryption algorithm and the required cryptograph is obtained. The encryption performance and security of SM4 algorithm are analyzed. Results show that the cryptograph encrypted with the algorithm is not readable and this method satisfies the security standard of ACARS data-link messages.