Details

Autor(en) / Beteiligte

• Arnault, François
• Berger, Thierry P.
• Lauradoux, Cédric
• Minier, Marine

Titel

X-FCSR – A New Software Oriented Stream Cipher Based Upon FCSRs

Ist Teil von

• Progress in Cryptology – INDOCRYPT 2007, p.341-350

Ort / Verlag

Berlin, Heidelberg: Springer Berlin Heidelberg

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 [3]. 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).