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counter mode |
Also found in: Wikipedia | 0.04 sec. |
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In cryptography, a sophisticated mode of operation. Counter mode uses an arbitrary number (the counter) that changes with each block of text encrypted. The counter is encrypted with the cipher, and the result is XOR'd into ciphertext. Since the counter changes for each block, the problem of repeating ciphertext that results from the electronic code book (ECB) method is avoided. See mode of operation, block cipher, XOR and AES-CCMP. |
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? Mentioned in | ? References in periodicals archive | |
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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. The product line features Advanced Encryption Standard (AES), Counter mode with CBC-MAC (AES-CCM), Galois Counter Mode (AES-GCM), XEX-AES, Triple-DES, Secure Hashing cores, and multiple-standard combined cores. The enterprise security processor also features packet filtering and flow processing, NAT, NAT-T, NAPT, IPSec and Secure Real-time Transport Protocol (SRTP) processing, as well as SHA-256, AES Galois Counter Mode (GCM), AES-XCBC-MAC-96, and Extended Sequence Numbers. |
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