Anthropic says Claude traced NIST ECDSA seeds to pseudorandom generator
Anthropic reports that its AI model identified the origin of five NIST elliptic curve seeds, challenging long-standing suspicions of an NSA backdoor.
Key points
- Anthropic states Claude traced NIST ECDSA curve seeds to a pseudorandom number generator.
- The finding challenges decades-old suspicions of an NSA backdoor in the algorithm.
- The mystery is explained as stemming from standard C generators rather than secret keys.
Anthropic announced that its Claude AI model successfully traced the origins of five NIST elliptic curve seeds to a pseudorandom number generator. This development directly challenges decades-old suspicions that the algorithm contained a National Security Agency backdoor.
According to Anthropic, the analysis determined that the cryptographic mystery stems from standard C generators. The company stated that the seeds were not derived from secret backdoors or passphrases. Instead, the origins are linked to a simple C random number generator process.
Context and Background
As Threat Times reported on October 18, 2026, an internal Claude model determined that the 25-year-old cryptographic mystery stems from standard C generators. Earlier reporting on October 17, 2026, noted that Anthropic’s Claude solved the mystery by tracing the origins to a simple C random number generator.
Techmeme reported that Anthropic’s statement challenges decades-old suspicions of an NSA backdoor in the algorithm. The outlet summarized the finding by noting that the decades-old mystery of the origins of one of the most popular cryptographic standards has been explained.
Who Is Affected
The findings impact the understanding of NIST elliptic curve digital signature algorithm standards. These curves are widely used in modern cryptographic implementations for securing digital communications and transactions. The resolution of the seed origin question affects how security professionals view the historical integrity of these standards.
Security experts have long debated the provenance of these specific seeds. The confirmation that they originate from a pseudorandom number generator rather than a hidden key alters the historical narrative surrounding NIST cryptographic standards. This clarification removes the theoretical possibility of a specific type of backdoor insertion at the seed level.
What should you do?
Organizations relying on NIST elliptic curves should review their current cryptographic implementations. While the seed origin is now clarified as non-malicious, maintaining robust key management practices remains essential for security. Monitoring vendor announcements for any further analysis on these standards is advisable.
What to do and how to stay safe: Anthropic
- Review current cryptographic implementations to ensure they use supported and verified elliptic curve standards.
- Monitor official security advisories from standards bodies for any updates regarding NIST curve parameters.
- Verify that your systems are not relying on deprecated or poorly understood cryptographic primitives.
- Consult with internal security teams to assess if any legacy systems require migration from older curve implementations.
Step-by-step guide: Social Engineering Warning Signs and How to Respond
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Did Anthropic find an NSA backdoor in the NIST curves?
No, Anthropic’s Claude model traced the seeds to a pseudorandom number generator, challenging the suspicion of a backdoor.
What did the AI model determine about the seed origins?
The model determined that the seeds stem from standard C generators, not secret backdoors or passphrases.
How long has this mystery existed?
The mystery regarding the origins of these five NIST elliptic curve seeds is 25 years old.
