Today we have seen more and more public key protocols use in networked and distributed systems, so we must select an secure public key protocol otherwise it will jeopardy the secrecy of networks.
目前，密码系统中大量地使用基于公钥的密码协议，这些协议的安全性直接影响着网络系统的安全。
In any case, Public Key Certificates (PKCs) are required for these protocols.
在任何情况下，公共密钥证书(蛋白)都需要这些协议。
The public key cryptosystem secure against chosen ciphertext attacks is a very strong secure cryptosystem and is a useful primitive for designing protocols that resisting active adversary.
抗选择密文攻击公钥密码体制是安全性很高的密码体制，它是设计抗主动攻击的协议非常有用的工具。
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