cryptography Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adver ...

, 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 Tadayoshi Kohno,

John Viega John Viega (born February 22, 1974) is an American computer security author, researcher and professional. Early life He earned his BA from the University of Virginia. As an undergraduate, he worked in Randy Pausch's Stage 3 Research Group, as an ...

and

Doug Whiting Doug is a male personal name (or, depending on which definition of "personal name" one uses, part of a personal name). It is sometimes a given name (or "first name"), but more often it is hypocorism (affectionate variation of a personal name) which ...

. CWC mode was submitted to NIST for standardization, but NIST opted for the similar

GCM mode In cryptography, Galois/Counter Mode (GCM) is a mode of operation for symmetric-key cryptographic block ciphers which is widely adopted for its performance. GCM throughput rates for state-of-the-art, high-speed communication channels can be achiev ...

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