A reduce function then processes those intermediate key-value pairs, merging the values for the associated keys (see Figure 1).

然后reduce函数会处理这些中间键值对，并合并相关键的值(请参考图1)。

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HMAC can be used with any iterative cryptographic hash function, such as MD5 or SHA-1, in combination with a secret Shared key.

HMAC可以与任何反复式的密码编译杂凑函式(例如MD 5或SHA - 1)一起使用，并与秘密共用金钥组合。

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