The Design and Evolution of OCB
Ted Krovetz, Phillip Rogaway
Abstract
Abstract 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.
Topics & Concepts
Scheme (mathematics)Mode (computer interface)EncryptionComputer scienceVariety (cybernetics)Authenticated encryptionTheoretical computer scienceComputer securityMathematicsArtificial intelligenceHuman–computer interactionMathematical analysisCryptographic Implementations and SecurityCryptography and Data SecurityChaos-based Image/Signal Encryption