Paper 2013/835
A Modular Framework for Building Variable-Input Length Tweakable Ciphers
Thomas Shrimpton and R. Seth Terashima
Abstract
We present the Protected-IV construction (PIV) a simple, modular method for building variable-input-length tweakable ciphers. At our level of abstraction, many interesting design opportunities surface. For example, an obvious pathway to building beyond birthday-bound secure tweakable ciphers with performance competitive with existing birthday-bound-limited constructions. As part of our design space exploration, we give two fully instantiated PIV constructions, TCT1 and TCT2; the latter is fast and has beyond birthday-bound security, the former is faster and has birthday-bound security. Finally, we consider a generic method for turning a VIL tweakable cipher (like PIV) into an authenticated encryption scheme that admits associated data, can withstand nonce-misuse, and allows for multiple decryption error messages. Thus, the method offers robustness even in the face of certain sidechannels, and common implementation mistakes.
Note: Typo fixes and minor clarifications.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- A major revision of an IACR publication in ASIACRYPT 2013
- Keywords
- tweakable block ciphersauthenticated encryptiondisk encryptionnonce misuse
- Contact author(s)
- seth @ cs pdx edu
- History
- 2014-08-22: revised
- 2013-12-16: received
- See all versions
- Short URL
- https://ia.cr/2013/835
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2013/835,
author = {Thomas Shrimpton and R. Seth Terashima},
title = {A Modular Framework for Building Variable-Input Length Tweakable Ciphers},
howpublished = {Cryptology {ePrint} Archive, Paper 2013/835},
year = {2013},
url = {https://eprint.iacr.org/2013/835}
}
