期刊
CRYPTOGRAPHY AND COMMUNICATIONS-DISCRETE-STRUCTURES BOOLEAN FUNCTIONS AND SEQUENCES
卷 9, 期 2, 页码 273-289出版社
SPRINGER
DOI: 10.1007/s12095-015-0173-2
关键词
Stream cipher; Encryption; FSR; Wireless; 5G
资金
- Swedish Foundation for Strategic Research [SM12-0005, SM12-0025]
- Swedish Foundation for Strategic Research (SSF) [SM12-0005, SM12-0025] Funding Source: Swedish Foundation for Strategic Research (SSF)
The demand for more efficient ciphers is a likely to sharpen with new generation of products and applications. Previous cipher designs typically focused on optimizing only one of the two parameters - hardware size or speed, for a given security level. In this paper, we present a methodology for designing a class of stream ciphers which takes into account both parameters simultaneously. We combine the advantage of the Galois configuration of NLFSRs, short propagation delay, with the advantage of the Fibonacci configuration of NLFSRs, which can be analyzed formally. According to our analysis, the presented stream cipher Espresso is the fastest among the ciphers below 1500 GE, including Grain-128 and Trivium.
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