International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Richard Ostertag

Publications

Year
Venue
Title
2005
EPRINT
On High-Rate Cryptographic Compression Functions
Richard Ostertag Martin Stanek
The security of iterated hash functions relies on the properties of underlying compression functions. We study highly efficient compression functions based on block ciphers. We propose a model for high-rate compression functions, and give an upper bound for the rate of any collision resistant compression function in our model. In addition, we show that natural generalizations of constructions by Preneel, Govaerts, and Vandewalle to the case of rate-$2$ compression functions are not collision resistant.

Coauthors

Martin Stanek (1)