Abstract
Self-synchronizing stream cipher (SSSC) has the advantage that the receiver can automatically synchronize with the sender after receiving previously transmitted ciphertext. However, it has also serious difficulty to keep security due to its self-synchronizing structure. In this paper, a new SSSC based on one-way coupled chaotic map lattice is proposed. By combining floating-point chaotic computations with algebraic operations, the cipher has high bit confusion and diffusion rates. It has both advantages of robustness of synchronization and strong security. The cipher can serve as a new type of SSSC candidate in software implementation.
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