Construction of a secure cryptosystem based on spatiotemporal chaos and its application in public channel cryptography

Details Construction of a secure cryptosystem based on spatiotemporal chaos and its application in public channel cryptography Construction of a secure cryptosystem based on spatiotemporal chaos and its application in public channel cryptography

2005-02-11

arxiv.org/abs/nlin/0502026v1

Nonlinear Sciences

Chaotic Dynamics

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Scientific paper

By combining the one-way coupled chaotic map lattice system with a bit-reverse operation, we construct a new cryptosystem which is extremely sensitive to the system parameters even for low-dimensional systems. The security of this new algorithm is investigated and mechanism of the sensitivity is analyzed. We further apply this cryptosystem to the public channel cryptography, based on "Merkle's puzzles", by employing it both as pseudo-random-number (PN) generators and symmetric encryptor. With the properties of spatiotemporal chaos, the new scheme is rich with new features and shows some advantages in comparison with the conventional ones.

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