Cryptography is the core domain in the information security technique. It provides many algorithms and protocols to meet practical need.

密码学作为信息安全技术的核心领域，提供了多种密码算法与应用协议以满足人们实际应用的需要。

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The network information security technique commonly includes authentication, authorization, audit, data privacy, data integrity and so on.

网络信息安全技术一般包括身份认证、授权控制、审计、数据保密和数据完整性等几个方面。

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