In cryptography

Cryptography

Cryptography is the practice and study of techniques for secure communication in the presence of third parties...

, F-FCSR is a stream cipher

Stream cipher

In cryptography, a stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream . In a stream cipher the plaintext digits are encrypted one at a time, and the transformation of successive digits varies during the encryption...

 developed by Thierry Berger, François Arnault, and Cédric Lauradoux. The core of the cipher is a Feedback with Carry Shift Register (FCSR) automaton, which is similar to a LFSR, but they perform operations with carries so their transition function is nonlinear.

F-FCSR one of the eight algorithms selected for the eCRYPT

ECRYPT

ECRYPT is a 4-year European research initiative launched on 1 February 2004.The stated objective is to, "intensify the collaboration of European researchers in information security, and more in particular in cryptology and digital watermarking.ECRYPT list five core research areas, termed "virtual...

 networks eSTREAM

ESTREAM

eSTREAM is a project to "identify new stream ciphers suitable for widespread adoption", organised by the EU ECRYPT network. It was set up as a result of the failure of all six stream ciphers submitted to the NESSIE project. The call for primitives was first issued in November 2004. The project was...

Portfolio, but was later removed because after analysis showed weaknesses.