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X-FCSR

swMATH ID: 2717
Software Authors: Arnault, François; Berger, Thierry P.; Lauradoux, Cédric; Minier, Marine
Description: X-FCSR – a new software oriented stream cipher based upon FCSRs. Feedback with Carry Shift Registers (FCSRs) are a promising alternative to LFSRs in the design of stream ciphers. The previous constructions based on FCSRs were dedicated to hardware applications. In this paper, we will describe X-FCSR a family of software oriented stream ciphers using FCSRs. The core of the system is composed of two 256-bits FCSRs. We propose two versions: X-FCSR-128 and X-FCSR-256 which output respectively 128 and 256 bits at each iteration. We study the resistance of our design against several cryptanalyses. These stream ciphers achieve a high throughput and are suitable for software applications (6.3 cycles/byte).
Homepage: http://www.ecrypt.eu.org/stream/
Keywords: stream cipher; FCSRs; software design; cryptanalysis
Related Software: eSTREAM; mCrypton; Quark; PRESENT
Cited in: 8 Documents

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