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If an attacker observes two or three consecutive outputs of Math.random(), they can reverse-engineer the internal state of the generator and predict all future (and past) values with 100% accuracy. This has been demonstrated in multiple research projects and open-source tools.

https://www.reddit.com/r/AskProgramming/comments/1qt1n0i/comment/o2ziocg/

Despite its quality, xorshift128+ is not cryptographically secure. For security-sensitive applications, use crypto.getRandomValues() instead

https://www.reddit.com/r/AskProgramming/comments/1qt1n0i/comment/o2ziocg/

W sumie wiadomo, że to pseudolosowe, ale 2-3 outputy żeby wyliczyć seed to trochę mało.

#javascript #js

How random is Math.random()? How does it generate a seed? Theoretically speaking, could we predict the exact random value at any point?

Komentarze (2)

radziol 5 miesięcy temu

@Deykun 2-3 to ciężko sekwencją nazwać, żeby z tego coś sensownego wyciągnąć

MostlyRenegade 5 miesięcy temu

@Deykun dlaczego mało?

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