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Inversing a random numbers

Virus Writing Bulletin [1]
January 2011

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It is desireable feature for a polymorphic virus to avoid linear memory access during decryption. In 2000 The Mental Driller proposed an algorithm, known as PRIDE [1] which could easily produce a large number of permutations. In this paper I would present another technique to randomize the memory access within decryption loop, based on the linear and inversive congruential random numbers generators which properties are well characterized.

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