The secure service in electronic commerce is realized of secure mechanisms, moreover secure mechanisms are the concrete method and the technique to realize secure service.
电子商务安全服务是通过安全机制来实现的，安全机制是实现安全服务的具体方法和技术。
A public-key infrastructure (PKI) is a prerequisite for security in distributed systems and for electronic commerce. For secure communication, an user can get another user's public key from PKI.
分布式系统和电子商务的安全以公钥基础结构(PKI)为基础，为实现信息的安全交换，用户可从PK I中得到另一用户的公钥及其证书。
Therefore it is necessary to filter unhealthy network information so as to keep electronic commerce environment secure, healthy and harmonious.
因此，为了营造一个安全、健康及和谐的电子商务环境，对不良网络信息的过滤就显得非常重要。
Finally, we propose an electronic commerce transaction system based on the forward secure threshold proxy signature scheme.
最后基于前向安全代理签名方案给出了一个电子交易方案。
Finally, we propose an electronic commerce transaction system based on the forward secure threshold proxy signature scheme.
最后基于前向安全代理签名方案给出了一个电子交易方案。
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