| 摘要 |
A method of authenticating a message from a sending party to a receiving party. The sending party generates a digest of the message using a key, and sends the digest to the receiving party. The receiving party also generating the digest of the message using the key, and compares the digests to confirm the message was sent by the sending party. The key may be sent by the sending party to the receiving party by an authenticatable method; alternatively, the parties may use a secret previously agreed key.
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