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Paper 2013/628

Parallelizable Authenticated Encryption from Functions

Kazuhiko Minematsu

Abstract

A new authenticated encryption (AE) mode for blockcipher is presented. The proposed scheme has attractive features for fast and compact operation. It requires rate-1 blockcipher call, and uses the encryption function of a blockcipher for both encryption and decryption. Moreover, the scheme enables one-pass, parallel operation under two-block partition. The proposed scheme thus attains similar characteristics as the seminal OCB mode, without using the inverse blockcipher. The key idea of our proposal is a novel usage of two-round Feistel permutation, where the round functions are derived from the theory of tweakable blockcipher. We also describe an instantiation of our idea using a non-invertible primitive, such as a keyed hash function.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
authenticated encryptionblockciphermode of operation
Contact author(s)
k-minematsu @ ah jp nec com
History
2017-06-05: last of 3 revisions
2013-09-30: received
See all versions
Short URL
https://ia.cr/2013/628
License
Creative Commons Attribution
CC BY
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