Journal
JOURNAL OF CRYPTOLOGY
Volume 34, Issue 4, Pages -Publisher
SPRINGER
DOI: 10.1007/s00145-021-09399-8
Keywords
AEAD; Authenticated encryption; CAESAR competition; Cryptographic standards; Fast software encryption; Modes of operation; OCB
Categories
Funding
- NSF [0904380, 1314885, 1717542]
- Direct For Computer & Info Scie & Enginr [1314885, 1717542] Funding Source: National Science Foundation
- Division Of Computer and Network Systems [1314885, 1717542] Funding Source: National Science Foundation
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [0904380] Funding Source: National Science Foundation
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OCB3 is the final version of a blockcipher mode for authenticated encryption, proven to be secure up to the birthday bound assuming a secure underlying blockcipher. The scheme's software performance has been studied by comparing its speed on multiple platforms to other AE schemes, and a reflection on the history and development of the mode has been provided.
We describe OCB3, the final version of OCB, a blockcipher mode for authenticated encryption (AE). We prove the construction secure, up to the birthday bound, assuming its underlying blockcipher is secure as a strong-PRP. We study the scheme's software performance, comparing its speed, on multiple platforms, to a variety of other AE schemes. We reflect on the history and development of the mode.
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