基于LUC的密钥共识协议

New key agreement protocol based on LUC system

网络上进行保密通信,通信双方能否安全地进行,很大程度上取决于密钥的安全分配和协商。已有的密钥共识协议不能抵抗主动攻击。RSA密码体制用于身份验证时,不能抵抗乘法攻击。通过对LUC公钥密码体制的研究,给出了新的密钥共识协议,并为研究密钥共识问题提供了新的思路。新的协议可以抵抗被动攻击并发现主动攻击;储存密钥密文的攻击对本协议无效。

Modem cryptography must satisfy requirement that the security of the system depend on the secrecy of the keys but not the secrecy of the algorithms of encryption or decryption. If two users want to communicate in network, they must find an independent but secure method for exchanging the key by themselves. A key agreement protocol is invulnerable to passive and active attack. A new principle of data transmission was described on basis of the difficulty of solving the uncertain equation. Then, a new authentication key agreement protocol was presented according to the principle and the LUC PKC. The new protocol can withstand the passive attack and find active attack and guard against the attack of storing the key message.