The message digest (also called the message authentication code) is computed using a hash function.
消息摘要（又称消息认证代码）是用散列函数计算的。
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。
Forms authentication not only writes the user's name into the cookie, it adds a message authentication code (a hash formed from the cookie and a secret value that only the Web server knows).
表单验证不仅将用户名写入Cookie，它还写入信息验证码(一种来自Cookie和只有服务器知道的密值的散列形式)。
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。
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。
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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