该模式决定讯息传输安全性功能 (完整性、机密性与验证) 需要哪些机制。
The mode determines the mechanisms by which message transfer security functions (integrity, confidentiality and authentication) are required.
讯息验证提供方法来确保讯息的完整性,并验证传送讯息者。
Message authentication provides a way to ensure message integrity and to verify who sent the message.
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