A very important factor of network security is cryptographic protocols.
网络安全中一个非常重要的因素就是密码协议。
Security protocols are the basis of security which provide security services in network.
安全协议提供安全服务，是保证网络安全的基础。
Security protocols are the basis of security which provide security services in network.
安全协议提供安全服务，是保证网络安全的基础。
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