| 摘要 |
An apparatus and a method for an authentication protocol. In one embodiment, a server generates a sequence number, and a server message authentication code based on a server secret key. The server sends the sequence number, an account identifier, and the server message authentication code to the client. The client generates a client message authentication code over the sequence number, a request specific data, and a shared secret key between the client and the server. The client sends a request to the server. The request includes the sequence number, the account identifier, the server message authentication code, the request specific data, and the client message authentication code. The server determines the validity of the client request with the shared secret key.
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