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CBC-MACCipher Block Chaining Message Authentication Code (data authentication system)
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The CCM mode of operation is a two-pass mode that combines the CTR mode and raw CBC-MAC to provide authenticated encryption.
In CCMP the first block of the CBC-MAC computation is not taken directly from our MPDU but is formed in a special way using a nonce value.
The newly introduced IP core, JetCombo-3, features Advanced Encryption Standard (AES), Counter mode with CBC-MAC (AES-CCM), Galois-Counter Mode (AES-GCM), and XTS-AES mode (XEX-based Tweaked-codebook-mode with ciphertext-Stealing) all combined in the same IP core by sharing hardware resources.