@article { author = {Alizadeh, J. and Aref, M. R. and Bagheri, N. and Sadeghi, H.}, title = {Cryptanalysis of some first round CAESAR candidates}, journal = {The ISC International Journal of Information Security}, volume = {7}, number = {2}, pages = {127-134}, year = {2015}, publisher = {Iranian Society of Cryptology}, issn = {2008-2045}, eissn = {2008-3076}, doi = {10.22042/isecure.2016.7.2.5}, 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 (2n/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}, url = {https://www.isecure-journal.com/article_39211.html}, eprint = {https://www.isecure-journal.com/article_39211_3b3184008270f50d09c43257f9f95c19.pdf} }