Public key cryptography, combined with the traditional symmetric cryptograph and the message digest technology, can provide confidentiality, integrity and proof of origin.
公钥密码技术结合传统的对称密码技术及信息摘要技术，可提供信息的保密性、完整性和信源确认，是多种安全应用的基础。
Modern cryptograph can be divided into symmetrical key system and dissymmetrical key system.
密码体制大体分为对称密码和非对称密码两种。
It is a new study direction of cryptograph that detecting potential flaws in cryptographic protocols using formal analysis of cryptographic protocol.
利用形式化分析密码协议的方法来检测密码协议中潜在的安全漏洞，已成为密码学中一个新的研究方向。
Quantum cryptograph has extraordinary adaptability to the optical communication and unconditional security which classical cryptography has been striving for.
量子密钥分配特别适合光通信环境，而且可以实现无条件安全性。
Quantum cryptograph has extraordinary adaptability to the optical communication and unconditional security which classical cryptography has been striving for.
量子密钥分配特别适合光通信环境，而且可以实现无条件安全性。
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