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国家自然科学基金(ZR2013FQ021)

作品数:4 被引量:8H指数:1
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Construction of Balanced Rotation Symmetric Boolean Functions with Optimal Algebraic Immunity被引量:1
2014年
Algebraic immunity is a new cryptographic criterion proposed against algebraic attacks. In order to resist algebraic attacks, Boolean functions used in many stream ciphers should possess high algebraic immunity. This paper presents one main result to find balanced rotation symmetric Boolean functions with maximum algebraic immunity. Through swapping the values of two orbits of rotation class of the majority function, a class of 4k+l variable Boolean functions with maximum algebraic immu- nity is constructed. The function f(x) we construct always has terms of degree n-2 independence of what ever n is. And the nonlinearity off(x) is relatively good for large n.
ZHANG Wenying
Eight-sided fortress: a lightweight block cipher被引量:6
2014年
In this paper, we present a new lightweight block cipher named eight-sided fortress(ESF), which is suitable for resource-constrained environments such as sensor networks and low-cost radio rrequency identification(RFID) tags. Meanwhile, we present the specification, design rationale and evaluation results in terms of the hardware implementation. For realizing both efficiency and security in embedded systems, similar to the other lightweight block ciphers, ESF is 64 bits block length and key size is 80 bits. It is inspired from existing block cipher, PRESENT and LBlock. The encryption algorithm of ESF is based on variant Feistel structure with SPN round function, used Feistel network as an overall structure with the purpose of minimizing computational resources.
LIU XuanZHANG Wen-yingLIU Xiang-zhongLIU Feng
关键词:LIGHTWEIGHTEFFICIENCY
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