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CCM mode - Wikipedia

2019-6-24 · CCM mode (Counter with CBC-MAC) is a mode of operation for cryptographic block ciphers.It is an authenticated encryption algorithm designed to provide both authentication and confidentiality.CCM mode is only defined for block ciphers with a block length of 128 bits. The nonce of CCM must be carefully chosen to never be used more than once for a given key.

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