Implementation of a Stream Cipher Based on Bernoulli's Map
This addresses a specific problem in hardware-based cryptography for secure communications, but it is incremental as it builds on existing chaotic map methods.
The authors tackled the degradation issue in digitally implemented chaotic maps for stream ciphers by proposing a mechanism, resulting in a cipher with 8 stages and 2 PRNGs that passed NIST tests.
A stream cipher was implemented on a FPGA. The keystream, for some authors the most important element, was developed using an algorithm based on Bernoullis chaotic map. When dynamic systems are digitally implemented, a normal degradation appears and disturbs their behavior; for such reason, a mechanism was needed. The proposed mechanism gives a solution for degradation issue and its implementation is not complicated. Finally, the implemented cipher includes 8 stages and 2 pseudo-random number generators (PRNG), such cipher was tested using NIST testes. Once its designing stage, it was implemented using a developing FPGA board.