How does PHP ensure the security of third-party interfaces?

1. When the user logs in to the APP, the https protocol is used to call the background related interface. The server generates an access_key based on the user name and password, and saves the access_key in the session. The generated access_key and session_id are returned to the APP side.

2. The APP saves the received access_key and session_id.

3. When the APP calls the interface to transmit data, the transmitted data and access_key use an encryption algorithm to generate a signature signature, and the signature and session_id are sent to the server together.

4. When the server receives data, it uses session_id to obtain the corresponding access_key from the session, and uses the same encryption algorithm to generate the corresponding signature for the access_key and the received data. If the generated signature is consistent with the received signature, At the same time, it indicates that the data is legitimate.

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