TY - JOUR ID - 39211 TI - Cryptanalysis of some first round CAESAR candidates JO - The ISC International Journal of Information Security JA - ISECURE LA - en SN - 2008-2045 AU - Alizadeh, J. AU - Aref, M. R. AU - Bagheri, N. AU - Sadeghi, H. AD - Faculty and Research Center of Communication and Information Technology, Imam Hossein University, Tehran, Iran. AD - Information Systems and Security Lab (ISSL), Sharif University of Technology, Tehran, Iran. AD - The Electrical Engineering Department of Shahid Rajaee Teachers Training University, Tehran, Iran. AD - Department of Mathematics, Faculty of Science, University of Qom, Qom, Iran. Y1 - 2015 PY - 2015 VL - 7 IS - 2 SP - 127 EP - 134 KW - Authenticated Encryption KW - CAESAR KW - ΑES _ CMCCv₁ KW - ΑVΑLΑNCHEv₁ KW - CLΟCv₁ KW - SILCv₁ KW - Distinguishing Attack KW - Forgery Attack DO - 10.22042/isecure.2016.7.2.5 N2 - 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. UR - https://www.isecure-journal.com/article_39211.html L1 - https://www.isecure-journal.com/article_39211_3b3184008270f50d09c43257f9f95c19.pdf ER -