Anthropic says an internal research model identified the origins of five prime-curve seeds in under half an hour. The finding concerns how public parameters were selected, not the recovery of private encryption keys.

The company explicitly says this is not a cryptographic break or a new weakness in ECDSA. Its account is a first-party research claim, and the briefing does not independently reproduce the computations.

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This is an original summary, not a republication of the full report.

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