hash-based_message_authentication_code

1.Ideally, use hash-based message authentication code (HMAC) because it's the most secure.
理想的情况下，使用基于哈布的消息验证码(HMAC)，因为它最安全。
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2.Creates an instance of the default implementation of a Hash-based Message Authentication Code (HMAC).
创建基于哈希的消息验证代码(HMAC)实现的实例。
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3.The construction of a provable hash algorithm is developed based on the operations from various groups, also, a safety message authentication code is presented by the result.
本文利用来自不同群的运算，构造一种能证明其安全性的杂凑算法，并应用已证明的结果构造安全的消息认证码。
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