Anthropic 的 Claude 在 30 分钟内破解 NSA 25 年前的密码学谜题
Anthropics' Claude cracks a 25-year-old NSA cryptography mystery in under 30 minutes
Anthropic 的 Claude 解开了困扰 25 年的 ECDSA 曲线种子来源之谜：种子来自简单 C 随机数生成器 lrand48，并以 1997 年 5 月至 1998 年 4 月之间的 Unix 时间戳初始化，全程用时不到 30 分钟。
Oct 17, 2026
Anthropic's AI Claude has solved a 25-year-old cryptography mystery. NIST standardized several curves in the ECDSA standard, the most widely used framework for elliptic-curve digital signatures, back in 2000. The NSA had supplied the seeds, the starting values used to generate the curve parameters, with zero explanation. No one knew how they were created, and that fueled suspicion of possible backdoors. The mystery even attracted a bounty and amateur sleuthing efforts. The late NSA employee Jerry Solinas had suggested the seeds were a hash of a humorous phrase, but that turned out to be wrong.
Claude cracked it in under 30 minutes. The seeds came from "lrand48," a simple C random number generator, initialized with a Unix timestamp between May 1997 and April 1998. Claude spotted the pattern because "lrand48" only outputs 31 bits, and the top bits in some seeds were systematically zero. According to Anthropic, this makes deliberate backdoors less likely. Anthropic is donating the $36,864 bounty to the Internet Security Research Group.
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来源：The Decoder · the-decoder.com