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数字签名技术是信息化建设中的关键安全机制之一,数据加密、数字签名方案是保障通讯数据真实可靠的关键,它们各自实现不同的安全需求。而签密能够在一个合理的逻辑步骤内同时完成数字签名和公钥加密两项功能,而其计算量和通信成本都要低于传统的“先签名后加密”。基于PKI的签密体制在很好地提供机密性(Confidentiality)、完整性(Integrity)、认证(Authentication)和不可否认性(Non-repudiation)的同时,能较好的提高效率和成本,同时易于实现。
Digital signature technology is one of the key security mechanisms in the construction of information technology. Data encryption and digital signature schemes are the key to guarantee the authenticity and reliability of communication data. Each of them implements different security requirements. Signcryption can accomplish both digital signature and public key encryption in a reasonable logical step at the same time, and its computational cost and communication cost should be lower than the traditional “first signcryption”. PKI-based signcryption system can improve the efficiency and cost while providing confidentiality, integrity, authentication and non-repudiation well, achieve.