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公开密钥密码体制把加密和解密的功能区分开来,使得1)许多人能以这样的方式加密信息,使其只有一个人可以阅读;或2)一个人能以这样的方式加密信息,使其许多人都可以阅读。这种对加解密功能的区分,导致了密钥管理的重大改进,并使对纯碎的数字信息进行“签名”成为可能。
The public-key cryptosystem distinguishes the functions of encryption and decryption so that 1) many people can encrypt information in such a way that it can be read by only one person; or 2) one can encrypt information in such a way that Many of its people can read. This distinction between cryptographic functions leads to a significant improvement in key management and makes it possible to “sign” purely digital information.