# Anthropics' Claude cracks a 25-year-old NSA cryptography mystery in under 30 minutes

> Source: <https://the-decoder.com/anthropics-claude-cracks-a-25-year-old-nsa-cryptography-mystery-in-under-30-minutes/>
> Published: 2026-10-17 14:42:56+00:00

Anthropic's AI model Claude has solved a 25-year-old cryptography puzzle. The mysterious seeds behind NIST's standard curves for digital signatures were provided by the NSA without explanation, raising long-standing suspicion about built-in backdoors. Claude figured out in under 30 minutes that the seeds came from "lrand48," a simple C random number generator, making deliberate backdoors far less likely.

The article [Anthropics' Claude cracks a 25-year-old NSA cryptography mystery in under 30 minutes](https://the-decoder.com/anthropics-claude-cracks-a-25-year-old-nsa-cryptography-mystery-in-under-30-minutes/) appeared first on [The Decoder](https://the-decoder.com).