5/28/2023 0 Comments Random number generator crackI can share a pointer to why this works, if anyone is interested. ![]() 10 here is arbitrary if you make it k, then the probability that this fails is exponentially small in k. To recover m, define t n = s n+1 - s n and u n = | t n+2 t n - t 2 n+1| then with high probability you will have m = gcd( u 1, u 2. I'll show how below don't read on if you prefer to try to figure it out for yourself. It is an interesting exercise to derive how to do so efficiently it can be done. If none of a, b, m are known, one can still break a linear congruential generator, by first recovering m. If m is known to the attacker and a, b are not known, then Thomas described how to break it. ![]() ![]() In its simplest form, the generator just outputs s n as the nth pseudorandom number. There are extremely efficient ways to break a linear congruential generator.Ī linear congruential generator is defined by s n+1 = a s n + b mod m, where m is the modulus.
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