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Nokia Conectivity Solution 7.0.0.09/18/2023 ![]() In many situations, its desirable to authenticate these fields, though they must be left in the clear for the network to function properly. When using GCM to secure network protocol, this input could include addresses, ports, sequence numbers, protocol version numbers, and other fields that indicate how the plaintext should be handled, forwarded, or processed. The authenticated decrypt operation will, with high probability, return 'FAIL' when its inputs were not created by the encrypt operation with the identical key.The additional authenticated data A is used to protect information that needs to be authenticated, but which must be left unencrypted. A ciphertext C, initialization vector IV, additional authenticated data A and tag T are authentic for key K when they are generated with the encrypt operation with inputs K, IV, A and P, for some plaintext P. ![]() It has only a single output, either the plaintext value P or a special symbol 'FAIL' that indicates that the inputs are not authentic. ![]() The authenticated decryption operation has five inputs: K, IV, C, A and T. ![]()
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