电子商务中的身份鉴别和交易认证需要采用很多安全技术。其中最主要的有四个，分别是密码技术、数字签名、身份认证和数字证书，以及认证中心。密码技术密码技术是其他各种安全技术的基础。利用密码技术，可以将某些重要信息和数据从一个可以理解的明文形式变换成一种复杂错乱 Authentication and transaction authentication in e-commerce require a great deal of security technology. One of the most important are four, namely, cryptography, digital signatures, identity and digital certificates, and certification center. Cryptography Cryptography is the basis for a variety of other security technologies. Using cryptography, some important information and data can be transformed from a plaintext in understandable form into a complex mess