In cryptography, CWC Mode (Carter–Wegman + CTR mode) is an AEAD block cipher mode of operation that provides both encryption and built-in message integrity, similar to CCM and OCB modes. It combines the use of CTR mode for encryption with an efficient polynomial Carter–Wegman MAC and is designed by

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, John Viega and Doug Whiting. CWC mode was submitted to

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for standardization, but NIST opted for the similar GCM mode instead. Although GCM has weaknesses compared to CWC, the GCM authors successfully argued for GCM.https://csrc.nist.gov/CSRC/media/Projects/Block-Cipher-Techniques/documents/BCM/Comments/CWC-GCM/gcm-update.pdf

References

External links

CWC mode home page

CWC: A high-performance conventional authenticated encryption mode
on Cryptology ePrint
Implementation of CWC
on top of

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. Block cipher modes of operation Authenticated-encryption schemes {{crypto-stub