Enhanced Software Implementation of a Chaos-Based Stream Cipher

Guillaume Gautier (1) , Safwan El Assad , Olivier Déforges (1) , Sylvain Guilley (2) , Adrien Facon (2) , Wassim Hamidouche (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 Secure-IC S.A.S

Cipher algorithms have been created a long time ago to protect sensitive information. With the evolution of technology, particularly the increase of computational power, the multiplication of devices, the interconnection of those devices, ciphers need to be created and/or enhanced to match challenges brought by this new environment. In general, chaos-based stream ciphers have three shortcomings: their implementation is not constant-time, they have weak keys, and are not portable. We show in this paper how to overcome those three limitations in the case of our stream cipher. The stream cipher performance including statistical analysis and computational performance are carried out and compared to state-of-the-art algorithms: Advanced Encryption Standard (AES)-CounTeR (CTR), HC-128 and Rabbit.

Mots clés: Constant time; Statistical analysis; Computational performance; Chaos-based stream ciphers

Domaines: Cryptographie et sécurité [cs.CR]

Guillaume Gautier, Safwan El Assad, Olivier Déforges, Sylvain Guilley, Adrien Facon, et al.. Enhanced Software Implementation of a Chaos-Based Stream Cipher. SECURWARE 2018, Sep 2018, Venise, Italy. pp.128-133. ⟨hal-02157298⟩