通过数据包筛选和执行信任通信来抵御网络攻击。
To defend against network attacks through packet filtering and the enforcement of trusted communication.
这个广受欢迎的微博客网站，在星期四的大部分时间里停止服务，它其实是在抵御一场网络攻击，但当天晚间服务得到了恢复。
Twitter, the popular microblogging site, was out of service much of the day Thursday as it worked to defend itself against a Web attack, but service appeared to have been restored by late evening.
对该密码安全体制进行安全分析后表明：该体制能有效地抵御网络中的消息重放攻击和中间人攻击，并在实际应用中有较高的可行性。
The analysis of security for the cryptography demonstrates the cryptography can resist the message replay attacks and man in the middle attacks, and is feasible in practice.
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