شماره ركورد كنفرانس
4058
عنوان مقاله
Modified Fixed Point Attack on Gost2
پديدآورندگان
Ahmadi Siavash s_ahmadi@ee.sharif.edu Information Systems and Security Lab (ISSL), Department of Electrical Engineering, Sharif University of Technology , Aref Mohammad Reza aref@sharif.edu Information Systems and Security Lab (ISSL), Department of Electrical Engineering, Sharif University of Technology
تعداد صفحه
4
كليدواژه
Cryptanalysis , Fixed Point Attack , Gost Block Cipher
سال انتشار
1396
عنوان كنفرانس
چهاردهمين كنفرانس بين المللي انجمن رمز ايران
زبان مدرك
انگليسي
چكيده فارسي
One of the well known block ciphers is Gost which
was accepted as a Russian Standard, and was proposed to
be included in ISO/IEC 18033-3. But, recent attacks on this
cipher result in extracting more weaknesses of it and so the
standardization of Gost was rejected. In 2015, the designers
proposed a modified version of Gost, namely Gost2, which has a
new key schedule and explicit choice for Sboxes. In this paper,
we present a modified algorithm for fixed point attack on Gost2
with computational complexity of 2230:2. This computational
complexity has a factor of 26:8 improvement with the cost of
increasing memory complexity in comparison to previous attack
which has 2237 computational complexity
كشور
ايران
لينک به اين مدرک