CryptoDB
Collision-Resistant usage of MD5 and SHA-1 via Message Preprocessing
Authors: | |
---|---|
Download: | |
Abstract: | A series of recent papers have demonstrated collision attacks on popularly used hash functions, including the widely deployed MD5 and SHA-1 algorithm. To assess this threat, the natural response has been to evaluate the extent to which various protocols actually depend on collision resistance for their security, and potentially schedule an upgrade to a stronger hash function. Other options involve altering the protocol in some way. This work suggests a different option. We present several simple message pre-processing techniques and show how the techniques can be combined with MD5 or SHA-1 so that applications are no longer vulnerable to the known collision attacks. For some applications, this may a viable alternative to upgrading the hash function. |
BibTeX
@misc{eprint-2005-12582, title={Collision-Resistant usage of MD5 and SHA-1 via Message Preprocessing}, booktitle={IACR Eprint archive}, keywords={SHA-1, MD5, padding, hash collision, signature}, url={http://eprint.iacr.org/2005/248}, note={RSA Conference 2006 mszydlo@rsasecurity.com 13074 received 29 Jul 2005, last revised 18 Oct 2005}, author={Michael Szydlo and Yiqun Lisa Yin}, year=2005 }