An internal Claude model works out in under half an hour how the “seeds” of five standard NIST elliptic curves (P-192 through P-521) were obtained: not a hash, but the output of the lrand48 random number generator seeded with a Unix timestamp; Anthropic stresses that this is not a break, not a new attack and not a weakness in the curves, and writes that the finding strengthens confidence that the curves contain no backdoors
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