Paper 2009/018

Huge 2ndpreimages and collisions of khichidi-1

prasanth Kumar Thandra, S.A.V. Satya Murty

Abstract

Khichidi-1 is a contestant of Sha-3. In this paper we exploited a weakness in the design of the algorithm. This allowed us to propose two kind of attacks 1) 2ndpreimage attack, 2) Collision attack. Our attacks are applicable to all the versions 224, 256, 384 and 512 and it is potentially strong.