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)
- 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
-
CC BY