International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Prasanth Kumar Thandra

Publications

Year
Venue
Title
2009
EPRINT
Huge 2ndpreimages and collisions of khichidi-1
prasanth Kumar Thandra S.A.V. Satya Murty
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.
2008
EPRINT
Weaknesses in HENKOS Stream Cipher
Prasanth Kumar Thandra S.A.V. Satya Murty R Balasubramanian
HENKOS is a synchronous stream cipher posted by Marius Oliver Gheorghita to eprint. In this paper we are going to present some weaknesses in the cipher. We first present a chosen IV attack which is very straight forward attack on the cipher. Second we present a group of weak keys.