On Di erential Properties of Data - Dependent Rotations and Their Use in MARS and RC
نویسندگان
چکیده
Data-dependent rotations have been found to be a useful component for designing block cipher including MARS and RC6, two candidates for AES. Existing analysis indicates that data-dependent rotations play an important role in thwarting di erential and linear attacks. In this paper, we study di erential properties of data-dependent rotations, and derive a complete characterization of all possible characteristics for the operation. We also compare the use of data-dependent rotations in MARS and RC6.
منابع مشابه
On the Design and Security of RC
The block cipher RC was designed in by Ron Rivest for RSA Data Security Inc In this paper we describe both the cipher and preliminary attempts to use both di erential and linear cryptanalysis
متن کاملMatching by Local Invariants Matching by Local Invariants
This paper presents a matching method which is based on invariants of the luminance function. This makes matching possible in the case of important geometric transformations between images. The method is robust to occlusion, as local properties of the image signal are used. We propose to use di erential measures invariant to rotations in a multi-scale framework. Promising results are obtained w...
متن کاملQuaternions, Interpolation and Animation
The main topics of this technical report are quaternions, their mathematical properties, and how they can be used to rotate objects. We introduce quaternion mathematics and discuss why quaternions are a better choice for implementing rotation than the well-known matrix implementations. We then treat di erent methods for interpolation between series of rotations. During this treatment we give co...
متن کاملTime-Dependent Structural Behavior of Repaired Corroded RC Columns Located in a Marine Site
The chloride corrosion of reinforcing steel in reinforced concrete (RC) structures is a significant reason for premature deterioration and failure of RC structures in aggressive environments such as Persian Gulf region. This is one of the most important sources of engineering and economic problems in developed countries. So, the repair and maintenance of RC structures exposed to corrosive envir...
متن کاملImpossible Diierential on 8-round Mars' Core
MARS is one of the AES nalists. The up-to-date analysis of MARS includes the discovery of weak keys, and Biham's estimation that a 12round variant of MARS is breakable. This estimation was partly founded based on a 7-round impossible di erential of the core of MARS. However, no such attack was presented to-date. In this paper we present two new longer impossible di erentials of 8 rounds.
متن کامل