对资料或杂凑值所做的任何变更都将导致结果不相符，因为必须具有秘密金钥的资讯，才能变更讯息并重新产生正确的杂凑值。

Any change to the data or the hash value results in a mismatch, because knowledge of the secret key is required to change the message and reproduce the correct hash value.

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对资料或杂凑值所做的任何变更都将导致结果不相符，因为必须具有秘密金钥的资讯，才能变更讯息并重新产生正确的杂凑值。

Any change to the data or the hash value will result in a mismatch, because knowledge of the secret key is required to change the message and reproduce the correct hash value.

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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。

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

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