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We describe a state recovery attack on the X-FCSR family of stream ciphers. In this attack we analyse each block of output… Expand The F-FCSR stream cipher family has been presented a few years ago. Apart from some flaws in the initial propositions, corrected… Expand A novel FCSR-based generalized self-shrinking stream sequence generator (called F-GSS) has been proposed. The F-GSS keystream… Expand The Feedback with Carry Shift Registers (FCSRs) have been proposed as an alternative to Linear Feedback Shift Registers (LFSRs… Expand Feedback with Carry Shift Registers (FCSRs) are a promising alternative to Linear Feedback Shift Registers (LFSRs) for the design… Expand The F-FCSR stream cipher family has been presented a few years ago. Apart from some flaws in the initial propositions, corrected… Expand The F-FCSR family of algorithms have been presented about one year ago with  and . While some flaws where found in the… Expand In this paper we present a new class of stream ciphers based on a very simple mechanism. The heart of our method is a Feedback… Expand This paper focuses on F-FCSR, a new family of stream ciphers proposed by Arnault and Berger at FSE 2005. It uses a non-linear… Expand F-FCSR-8: this version satisfies the requirements of Profile 1 (key length: 128 bits, IV length: up to 128 bits). However its… Expand