Verified facts
- According to Anthropic, an internal model identifies the origin of P-192, P-224, P-256, P-384 and P-521 seeds in under half an hour.
- The reconstruction uses the C lrand48 generator initialized from Unix timestamps; it reproduces public parameters rather than discovering private keys.
- The authors explicitly state this is neither a cryptographic break nor a new weakness and recommend no change in use.
What changes
An old transparency question can be resolved without making cryptography obsolete.
Practical implication
Do not replace cryptographic systems based on a sensational headline.
Availability
Public analysis; an internal model and no new user offering.
Limits and uncertainty
Weakness in a generator used to choose public parameters is not equivalent to weakness in a private-key generator. The result was not reproduced in this review.