Title of article :
Cryptanalysis of some first round CAESAR candidates
Author/Authors :
alizadeh, javad imam hossein university - faculty and research center of communication and information technology, ايران , aref, mohammad reza sharif university of technology - information systems and security lab (issl), Iran. , bagheri, nasour institute for research in fundamental sciences (ipm) - school of computer science, ايران , bagheri, nasour shahid rajaee teachers training university - electrical engineering department, ايران , rahimi, alireza imam hossein university - faculty and research center of communication and information technology, ايران , sadeghi, hassan university of qom - faculty of science - department of mathematics, Iran.
Abstract :
ΑΕS _ CMCCv₁, ΑVΑLΑNCHEv₁, CLΟCv₁, and SILCv₁ are four candidates of the first round of CAESAR. CLΟCv₁ is presented in FSE 2014 and SILCv₁ is designed upon it with the aim of optimizing the hardware implementation cost. In this paper, structural weaknesses of these candidates are studied. We present distinguishing attacks against ΑES _ CMCCv₁ with the complexity of two queries and the success probability of almost 1, and distinguishing attacks on CLΟCv₁ and SILCv₁ with the complexity of Ο (2^n/2) queries and the success probability of 0.63, in which n is bit length of message blocks. In addition, a forgery attack is presented against ΑVΑLΑNCHEv₁ which requires only one query and has the success probability of 1. The attacks reveal weaknesses in the structure of these first round candidates and inaccuracy of their security claims.
Keywords :
Authenticated Encryption , CAESAR , ΑES _ CMCCv₁ , ΑVΑLΑNCHEv₁ , CLΟCv₁ , SILCv₁ , Distinguishing Attack , Forgery Attack
Journal title :
ISeCure - The ISC International Journal of Information Security
Journal title :
ISeCure - The ISC International Journal of Information Security
