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, Akbar Rishakani, Mohammad Reza Shams Abad, Einolla Pasha,
Volume 12, Issue 1 (11-2012)
Abstract

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.

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