Attacks and Remedies for Randomness in AI (and with AI): Cryptanalysis of PHILOX and THREEFRY

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In this work, we address the critical yet understudied question of the security of the most widely deployed pseudorandom number generators (PRNGs) in AI applications. We show that these generators are vulnerable to practical and low-cost attacks by introducing both manual and automated cryptanalysis techniques. For this we partially, and to the best of our knowledge for the first time, take advantage of AlphaEvolve, a novel evolutionary coding agent guided by Large Language Models, to automate t