Trifork , a New Pseudorandom Number Generator Based on Lagged Fibonacci Maps

A new family of cryptographically secure pseudorandom number generators, is described. It is based on the combination of the sequences generated by three coupled Lagged Fibonacci generators, mutually perturbed. The mutual perturbation method consists of the bitwise XOR cross-addition of the output of each generator with the right-shifted output of the nearby generator. The proposed generator has better entropy and much longer repetition period than the conventional Lagged Fibonacci Generator. It passed successfully the most stringent randomness test suites. The effective speed of generation is approximately of one bit per computer clock cycle. The algorithm was programmed in C99 with 64 bits of word size.

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