2n-bit hash-functions using n-bit symmetric block cipher algorithms

Abstract

We present a new hash-function, which provides 2n-bit hash-results, using any n-bit symmetric block cipher algorithm. This hash-function can be considered as a extension of an already known one, which only provided n-bit hash-results. The difference is crucial, because a lot of symmetric block cipher algorithms use 64-bit blocks and recent works have shown that a 64-bit hash-result is greatly insufficient.