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SECURITY · forward · impact 1/5 · 2026-10-18 · Anthropic

Claude cracks NSA crypto puzzle in 30 minutes

Anthropic's AI solved a 25-year-old NSA cryptographic puzzle using 2000-era elliptic curve parameters, revealing a pattern in seed values that makes deliberate backdoors less likely.

Anthropic's Claude solved a 25-year-old NSA cryptography puzzle within 30 minutes. The puzzle involved NIST-standardized elliptic-curve digital signature parameters from 2000, where seed values originated from Unix timestamps between May 1997 and April 1998. Claude identified that 'lrand48' outputs 31 bits with systematically zero top bits in some seed values. Anthropic donated $36,864 to the Internet Security Research Group to support transparency in this area. Crucially, Anthropic states this pattern makes deliberate backdoors less likely—not impossible—meaning it doesn't create new vulnerabilities but reveals existing weaknesses in how systems were designed. This breakthrough has no direct impact on the affordability of basic needs, as it addresses cryptographic security rather than resource access. The source provides no evidence this reduces costs for food, shelter, or healthcare, nor does it indicate how this finding would scale to affect global resource distribution. The detail sits with the source.

Source: The Decoder