Paper 2006/376
A New Concept of Hash Functions SNMAC Using a Special Block Cipher and NMAC/HMAC Constructions
Vlastimil KLIMA
Abstract
In this paper, we present new security proofs of well-known hash constructions NMAC/HMAC proposed by Bellare et al. in 1996. We show that block ciphers should be used in hash functions in another way than it has been so far. We introduce a new cryptographic primitive called special block cipher (SBC) which is resistant to attacks specific for block ciphers used in hash functions. We propose to use SBC in the NMAC/HMAC constructions, what gives rise to the new concept of hash functions called Special NMAC (SNMAC). From our new NMAC/HMAC security proofs it follows that SNMAC hash functions are computationally resistant to preimage and collision attacks. Moreover, at CRYPTO 2005 Coron et al. proved that SNMAC is indifferentiable from a random oracle in the limit. SNMAC construction is general and it enables various proposals using different instances of the special block ciphers. We propose a special block cipher DN (Double Net) and define hash function HDN (Hash Double Net) as the SNMAC construction based on DN.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Extended version of the paper sent to EUROCRYPT 2007.
- Keywords
- Hash functionNMACHMACcollision resistancepreimage resistanceconception
- Contact author(s)
- v klima @ volny cz
- History
- 2006-11-07: revised
- 2006-11-03: received
- See all versions
- Short URL
- https://ia.cr/2006/376
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2006/376,
author = {Vlastimil KLIMA},
title = {A New Concept of Hash Functions {SNMAC} Using a Special Block Cipher and {NMAC}/{HMAC} Constructions},
howpublished = {Cryptology {ePrint} Archive, Paper 2006/376},
year = {2006},
url = {https://eprint.iacr.org/2006/376}
}
