Combined and Robust SNOW-ZUC Algorithm Based on Chaotic System

Mahdi Madani (1) , Camel Tanougast (1)

1 LCOMS - Laboratoire de Conception, Optimisation et Modélisation des Systèmes

SNOW-3G and ZUC are two stream ciphers standardized by the 3GPP (3rd Generation Partnership Project) organization to ensure the LTE (Long Term Evolution of radio networks) security. Unfortunately, these algorithms present some weaknesses. The main objective of this study is to design and implement an enhanced algorithm combining the functionalities of standard SNOW-3G and ZUC algorithms in order to provide security to the LTE network. A chaotic generator has been used to increase the randomness and robustness of generated key-streams. The proposed architecture was implemented on Xilinx virtex-S FPGA technology and its security was evaluated using many security tests (generated key-stream distribution, key sensitivity, key space, and NIST statistical tests). The experimental results show that the proposed design allows to encrypt data in two operating modes (SNOW-3G and ZUC modes) using limited hardware resources and power consumption while ensuring more resistance against cryptanalysis attacks.

Mots clés: SNOW-3G stream cipher; ZUC stream cipher; Robustness; Mobile security; Chaotic generator; NIST statistical analysis; Key sensitivity; Key space; Cryptanalysis; FPGA implementation

Domaines: Cryptographie et sécurité [cs.CR]; Systèmes embarqués; Systèmes dynamiques [math.DS]

Mahdi Madani, Camel Tanougast. Combined and Robust SNOW-ZUC Algorithm Based on Chaotic System. 2018 International Conference on Cyber Security and Protection of Digital Services (Cyber Security), Jun 2018, Glasgow, United Kingdom. pp.1-7, ⟨10.1109/CyberSecPODS.2018.8560677⟩. ⟨hal-03807463⟩