2004/07/31 by Shujun Li, Gonzalo Álvarez, Guanrong Chen +1 · 33 citations
Computer Science · Mathematics · Physics and Astronomy · #CHAOS (operating system) #Chaos control and synchronization #Chaos-based Image/Signal Encryption #Chaotic #Computer science #Computer security #Cryptanalysis #Cryptography #Cryptosystem #Encryption #Key (lock) #Key generation #Key space #Keystream #Mathematics #Noise (video) #Nonlinear Dynamics and Pattern Formation #Plaintext #Scheme (mathematics) #Secure communication #Theoretical computer science #cs.CR #nlin.CD
paper · pdf · doi:10.1063/1.1856711
published in Chaos An Interdisciplinary Journal of Nonlinear Science 15(1), 13703 (American Institute of Physics) · RevTeX4, 11 pages, 15 figures
openalex publication_date 2005/02/10 · arxiv created 2005/09/13 · arxiv updated 2016/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
This paper studies the security of a secure communication scheme based on two discrete-time intermittently chaotic systems synchronized via a common random driving signal. Some security defects of the scheme are revealed: 1) The key space can be remarkably reduced; 2) the decryption is insensitive to the mismatch of the secret key; 3) the key-generation process is insecure against known/chosen-plaintext attacks. The first two defects mean that the scheme is not secure enough against brute-force attacks, and the third one means that an attacker can easily break the cryptosystem by approximately estimating the secret key once he has a chance to access a fragment of the generated keystream. Yet it remains to be clarified if intermittent chaos could be used for designing secure chaotic cryptosystems.