Volume 12 (2020)
Volume 11 (2019)
Volume 10 (2018)
Volume 9 (2017)
Volume 8 (2016)
Volume 7 (2015)
Volume 6 (2014)
Volume 5 (2013)
Volume 4 (2012)
Volume 3 (2011)
Volume 2 (2010)
Volume 1 (2009)
1. New Fixed Point Attacks on GOST2 Block Cipher

Siavash Ahmadi; Mohammad Reza Aref

Volume 11, Issue 2 , Summer and Autumn 2019, , Pages 145-158

http://dx.doi.org/10.22042/isecure.2019.140663.424

Abstract
  GOST block cipher designed in the 1970s and published in 1989 as the Soviet and Russian standard GOST 28147-89. In order to enhance the security of GOST block cipher after proposing various attacks on it, designers published a modified version of GOST, namely GOST2, in 2015 which has a new key schedule ...  Read More

2. Biclique Cryptanalysis of Block Ciphers LBlock and TWINE-80 with Practical Data Complexity

Siavash Ahmadi; Zahra Ahmadian; Javad Mohajeri; Mohammad Reza Aref

Volume 11, Issue 1 , Winter and Spring 2019, , Pages 57-74

http://dx.doi.org/10.22042/isecure.2018.138036.420

Abstract
  In the biclique attack, a shorter biclique usually results in less data complexity, but at the expense of more computational complexity. The early abort technique can be used in partial matching part of the biclique attack in order to slightly reduce the computations. In this paper, we make use of this ...  Read More