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本文把数传系统中传输数据的安全性与可靠性作为一个整体考虑,针对M公钥的缺点,提出了加密与纠错相结合的MC分组加密纠错体制。分析了MC体制的安全性,讨论了密文通过有扰信道时的正确解密概率和安全性。指出MC体制无论在有扰或无扰信道中,都具有足够高的安全性和极大的正确解密概率,说明纠错与加密相结合的密码体制比一般的密码体制有更广泛的应用前景。
In this paper, the security and reliability of data transmission in digital transmission system are considered as a whole. According to the shortcoming of M public key, an encryption and error correction MC packet encryption and error correction system is proposed. The security of MC system is analyzed, and the probability and security of the correct decryption of ciphertexts through scrambling channels are discussed. It is pointed out that the MC system has high enough security and a great probability of correct decryption both in disturbed and unscrambled channels. It shows that the combination of error correction and encryption has a wider application prospect than the common cryptosystem.