cryptoProeasy

LCG Warmup

spbctf

Task: Recover parameter c of LCG when multiplier m and modulus n are known. Solution: Use formula c = (x1 - m * x0) mod n with 2 consecutive outputs to find c and predict next value.

$ ls tags/ techniques/
modular_arithmeticprnglcg
modular_arithmeticlcg_parameter_recovery
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