Title of article :
MulticollisionAttack on a Recently Proposed Hash Function vMDC-2
Author/Authors :
zolfaghari, zahra Department of Electrical Engineering - Shahid Rajaee Teacher Training University , asadollahi, hamid Department of Electrical Engineering - Shahid Rajaee Teacher Training University , bagheri, nasour Department of Electrical Engineering - Shahid Rajaee Teacher Training University
Abstract :
In this paper, we describe an attack on a new double block length hash function which was proposed as a variant of MDC-2 and MDC-4. The vMDC-2 compression function is based on two calls to a block cipher that compresses a 3n-bit string to a 2n-bit one. This attack is based on the Joux's multicollision attack, where we show that an adversary wins nding collision game by requesting 2^70 queries for n = 128-bit block cipher that is much less than the complexity of birthday attack.
Keywords :
DBL Compression Function , Iterated Hash Function , Multicollision Attack , Collision Attack
Journal title :
Astroparticle Physics
