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


  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. Impossible Differential Cryptanalysis on Deoxys-BC-256

F. Moazami; A.R. Mehrdad; H. Soleimany

Volume 10, Issue 2 , Summer and Autumn 2018, , Pages 93-105


  Deoxys is a final-round candidate of the CAESAR competition. Deoxys is built upon an internal tweakable block cipher Deoxys-BC, where in addition to the plaintext and key, it takes an extra non-secret input called a tweak. This paper presents the first impossible differential cryptanalysis of Deoxys-BC-256 ...  Read More

3. Impossible Differential Cryptanalysis of Reduced-Round Midori64 Block Cipher (Extended Version)

A. Rezaei Shahmirzdi; A. Azimi; M. Salmasizadeh; J. Mohajeri; M. R. Aref

Volume 10, Issue 1 , Winter and Spring 2018, , Pages 3-13


  Impossible differential attack is a well-known mean to examine robustness of block ciphers. Using impossible differential cryptanalysis, we analyze security of a family of lightweight block ciphers, named Midori, that are designed considering low energy consumption. Midori state size can be ...  Read More

4. Cipher text only attack on speech time scrambling systems using correction of audio spectrogram

H. Ghasemzadeh; M. Tajik Khasss; H. Mehrara

Volume 9, Issue 2 , Summer and Autumn 2017, , Pages 131-145

  Recently permutation multimedia ciphers were broken in a chosen-plaintext scenario. That attack models a very resourceful adversary which may not always be the case. To show insecurity of these ciphers, we present a cipher-text only attack on speech permutation ciphers. We show inherent redundancies ...  Read More