Volume 12, Issue 1 (11-2012)
2012, 12(1): 327-338 |
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rishakani A, shams abad M R, pasha E. Cryptographic properties of modular multiplication modulo a power of 2. Journal title 2012; 12 (1) :327-338
URL: http://jsci.khu.ac.ir/article-1-1463-en.html
URL: http://jsci.khu.ac.ir/article-1-1463-en.html
1- Researcher
2- Professor
2- Professor
Abstract: (5743 Views)
Modular multiplication modulo a power of two is one of the operators that is used in cryptography
specially symmetric cryptography. In this paper we investigate the statistical and algebraic properties of
this operator from the cryptographic viewpoint. At first we compute the distribution of the output of
modular multiplication modulo a power of two and the distribution of its component Boolean functions.
Then after presenting a criterion for measuring the imbalance of maps, we obtain the imbalance of
this operator and its component Boolean functions. At last we investigate the algebraic degree of the
component Boolean functions of this operator and present a lower bound for the degree of these
functions.
specially symmetric cryptography. In this paper we investigate the statistical and algebraic properties of
this operator from the cryptographic viewpoint. At first we compute the distribution of the output of
modular multiplication modulo a power of two and the distribution of its component Boolean functions.
Then after presenting a criterion for measuring the imbalance of maps, we obtain the imbalance of
this operator and its component Boolean functions. At last we investigate the algebraic degree of the
component Boolean functions of this operator and present a lower bound for the degree of these
functions.
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