Anthropic: Claude traces NIST curve seed origins in half an hour

1. 06:00
   WeChatDoonsec· Media coverage

   Anthropic's Claude AI cracked the U.S. National Security Agency's cryptography puzzle from 25 years ago in less than 30 minutes(opens the original post in a new tab)
2. 00:41
   X@omkhar· Discussion

   Claude traced the unexplained NIST P-curve seeds to lrand48 output seeded with Unix timestamps from 1997 and 1998, and…(opens the original post in a new tab)

1. 08:34
   X@userHandle· Discussion

   Claude traces the origin of NIST curve seeds in half an hour, no new vulnerabilities found. Claude took less than half an hour to trace the possible generation method of the seeds of multiple NIST elliptic curves: 1990s programs may have initialized lrand48 with Unix system time, then repeatedly searched for qualifying curves. Independent research…(opens the original post in a new tab)

1. 21:59
   X@theomlondhe· Discussion

   Where did the NIST P-256 seed come from? After 25 years, the answer: lrand48 seeded with a 1997 Unix timestamp. I reran…(opens the original post in a new tab)
2. 05:36
   X@HeyArtiAI· Discussion

   NIST P-256's mysterious seed turns out to come from a random-number generator started at 01:52:34 UTC on Aug 16, 1997.…(opens the original post in a new tab)
3. 01:55
   X@cortexch· Discussion

   𝗙𝗢𝗥 𝟮𝟳 𝗬𝗘𝗔𝗥𝗦 𝗡𝗢𝗕𝗢𝗗𝗬 𝗞𝗡𝗘𝗪 𝗪𝗛𝗘𝗥𝗘 𝗧𝗛𝗘 𝗡𝗦𝗔 𝗚𝗢𝗧 𝗧𝗛𝗘 𝗡𝗨𝗠𝗕𝗘𝗥𝗦 𝗕𝗘𝗛𝗜𝗡𝗗 𝗬𝗢𝗨𝗥 𝗣𝗔𝗦𝗦𝗞𝗘𝗬𝗦 𝗖𝗟𝗔𝗨𝗗𝗘 𝗙𝗜𝗚𝗨𝗥𝗘𝗗 𝗜𝗧 𝗢𝗨𝗧 𝗜𝗡 𝗨𝗡𝗗𝗘𝗥 𝟯𝟬 𝗠𝗜𝗡𝗨𝗧𝗘𝗦 t…(opens the original post in a new tab)

1. 23:51
   X@supereasyit· Discussion

   A research version of Claude inside Anthropic figured out, within half an hour, the seed sources of several elliptic curves from P-192 to P-521 in the NIST standard. These seeds were provided by the NSA in 2000 and have never been explained; some suspect a backdoor may be hidden. Claude found that they used the 1990s lrand…(opens the original post in a new tab)
2. 22:35
   WebTechRadar· Media coverage

   AI keeps breaking old encryption mysteries — and is dunking on humans too(opens the original post in a new tab)
3. 20:42
   X@AI7Sir· Discussion

   A secret the NSA kept for 25 years, Claude cracked in 30 minutes. In 2000, NIST set the ECDSA curve standard, the seed was provided by the NSA, and the source was not explained in a single word. The cryptography community suspected for 25 years: is there a backdoor hidden in this? The bounty was once raised to 36864 US...(opens the original post in a new tab)
4. 20:16
   X@IQofficial· Discussion

   1⃣ Anthropic, Claude Solves a 25-Year Cryptography Mystery @AnthropicAI shared how @claudeai traced the origins of the…(opens the original post in a new tab)
5. 19:59
   X@PookaFring· Discussion

   The seeds of these NIST P-256 elliptic curves have had a murky origin for 25 years, and people have long suspected a backdoor. Anthropic says Claude found the answer in half an hour: not a hash, but lrand48 from a 1990s C library, using Unix… from 1997 to 1998(opens the original post in a new tab)
6. 19:58
   X@TheDeFiAngel· Discussion

   ➠ @claudeai solved a 25-year-old cryptographic puzzle in under 30 minutes. The lesson is how AI used code, mathematics…(opens the original post in a new tab)
7. 19:14
   X@arnaudmercier· Discussion

   Anthropic Says Claude Traced NIST ECDSA Curve Seeds to a 1990S RNG - https://Unite.AI https://news.google.com/rss/artic…(opens the original post in a new tab)
8. 18:30
   WeChatDoonsec· Media coverage

   Claude took 30 minutes to solve an NSA cryptography puzzle that stood for 25 years, without breaking existing encryption systems(opens the original post in a new tab)
9. 18:00
   WebGigazine· Media coverage

   Claude solved the origin of the numerical values in a cryptographic standard that had been a mystery for over 25 years; the values the NSA provided without explanation were "1990s random numbers"(opens the original post in a new tab)
10. 15:14
    X@AlphaByPablo· Discussion

    Claude didn’t break cryptography. It challenged an old assumption. Anthropic says an internal research model traced NI…(opens the original post in a new tab)
11. 11:44
    X@skyniranjan098· Discussion

    Source: https://anthropic.com/research/ecdsa-curve-origins(opens the original post in a new tab)
12. 11:43
    X@skyniranjan098· Discussion

    Claude just solved a 25-year crypto mystery. NIST's ECDSA seeds, unexplained since the 90s, were lrand48 output, a wea…(opens the original post in a new tab)
13. 11:16
    X@TosGe995· Discussion

    ☢ SOMEWHERE, A GUY IS REVERSING THE NIST SEEDS TO FIND SATOSHI'S KEYS 💀 Anthropic just showed the NSA's "mystery" curv…(opens the original post in a new tab)
14. 10:28
    X@bit_SusanKi· Discussion

    [Coin Coin Explains for You] 🎙 Claude cracked the NSA elliptic curve seed puzzle in half an hour—what does it mean? This is not a cryptography disaster, but an entry added to the trust ledger. https://foresightnews.pro/article/detail/100974(opens the original post in a new tab)
15. 10:20
    X@OnchainGuancha· Discussion

    @0xTodd The other side is also quite interesting: even the NSA's Jerry himself forgot how the seeds came about, which shows that this curve's trust anchor was actually hanging in the air back then—people used it for decades, always feeling uneasy. This time Claude amounts to doing a belated "cryptographic archaeology" on it. AI's most scarce value in the security field…(opens the original post in a new tab)
16. 08:30
    X @MinLiBuilds

    The Anthropic Red report says Claude solved the NSA elliptic curve seed mystery in half an hour, and the 36,864 USD bounty was donated to ISRG

    X user @MinLiBuilds says Claude solved the NSA elliptic curve seed mystery in half an hour, for a bounty of 36,864 USD. It reverse-engineered the generation algorithm, found that the seed came from a 1990s C language random number generator, and reproduced the original timestamps of 1997–1998. The bounty, which had gone unclaimed for three years, was originally 12,288 USD; after choosing to donate it to charity it tripled, and was ultimately donated to ISRG, the organization behind Let’s Encrypt.

17. 07:29
    X@canary_deploy· Discussion

    Anthropic announced that its in-house Claude identified in about 30 minutes the seed generation method that had remained unexplained for over 25 years in the ECDSA digital signature standard. It was found to be generated by the 1990s C language random number "lrand48" and Unix time, and the backdoor long rumored…(opens the original post in a new tab)
18. 06:30
    X@YoneZ_AI· Discussion

    Today's AI news 2026/10/19 Claude reported that it traced the origin of NIST's elliptic curve seeds ・The output and explanation of the random number generator lrand48 ・The company says it is not a cryptographic weakness Click the icon for details. #Today'sAIN…(opens the original post in a new tab)
19. 04:58
    X@AfricaTewe56275· Discussion

    AI just solved a 25-year-old encryption mystery. 🔐 Claude traced the NIST curve seeds to an old random generator and a…(opens the original post in a new tab)
20. 02:49
    X@Shadowfetch· Discussion

    A 25-year mystery about where the NSA got its curve seeds, solved by Claude in under 30 minutes. Meanwhile I just spent…(opens the original post in a new tab)
21. 00:59
    X@brutal_IA· Discussion

    for 25 years people suspected the NSA hid a backdoor in math that protects much of the web. claude traced the mystery n…(opens the original post in a new tab)
22. 00:19
    X@Oday_Hunter· Discussion

    Claude solved a 26-year crypto mystery in under 30 minutes. The NSA-supplied seeds of the NIST P-curves aren't hashes.…(opens the original post in a new tab)

1. 21:19
   X@troovex· Discussion

   In 2000, a US standard shipped with a set of numbers from the NSA. Nobody explained where they came from. For 26 year…(opens the original post in a new tab)
2. 21:03
   X@George_Vasi_· Discussion

   Funny NIST seed twist: the hashed joke phrase rumour was a dead end 😄 Claude wasn't given that clue and found the P-cur…(opens the original post in a new tab)
3. 20:55
   X@0xTodd· Discussion

   As a researcher, I must admit that AI's most awesome aspect is that it has the cognition of an expert, yet has the patience to do an intern's work. Take Claude finding the elliptic curve seeds: first, this makes elliptic curves more secure (not cracked, okay). Because these seeds were originally provided by the NSA (US National Security Agency)…(opens the original post in a new tab)
4. 20:42
   X@willzero· Discussion

   Claude took less than half an hour to solve the mystery of the NIST curve seeds that the cryptography community had argued over for 25 years. According to an article published by Anthropic on October 16, the seeds of NIST elliptic curves such as P-256 came from Unix timestamps between 1997 and 1998…(opens the original post in a new tab)
5. 18:34
   X@Echosphere8f· Discussion

   Claude reproduced the 5 NIST elliptic curve "seeds" of unknown origin from an old random number generator and the time back then. Even though there was a secret passphrase theory, what came out was a clock. ...I did laugh a little at that. This is not a story about cryptography being broken. https://www.a…(opens the original post in a new tab)
6. 16:56
   X@Mikadzyki_NFT· Discussion

   i can't f*cking wrap my head around what Claude did the model cracked a 25-year-old NSA cryptography mystery in under…(opens the original post in a new tab)
7. 15:04
   RedditReddit r/Anthropic· Discussion

   Claude solves decades-old NSA mystery in under 30 minutes, then wonders if it's a test(opens the original post in a new tab)
8. 14:00
   X@ztacts· Discussion

   The origin of the seeds for those NIST elliptic curves was recently reverse-engineered by Claude. In that Anthropic article, Claude judged that the 1990s generation program used the C library's lrand48: a 48-bit linear congruential generator that emits only the high bits each time. Using these truncated…(opens the original post in a new tab)
9. 13:08
   RedditReddit r/Anthropic· Discussion

   Claude solved a 25 year old NSA cryptography mystery in 30 minutes. Its first reaction was to throw shade at us 🥲 "is it suspicious that such an obvious thing wasn't discovered in 25 years?"(opens the original post in a new tab)
10. 12:53
    X@vino72bkn· Discussion

    Claude solved a 25-year cryptography mystery in under 30 minutes: the mysterious seed parameters of NIST elliptic curves are not an NSA backdoor, but simply the 1990s C language random number generator lrand48 run casually with a timestamp. Bitcoin's secp256k1 is not among them. What stings is: this…(opens the original post in a new tab)
11. 12:43
    X@jacker0214_eth· Discussion

    A puzzle that had troubled the cryptography community for 25 years was solved by AI in half an hour. The "random seeds" of several NIST elliptic curves were provided by the NSA in the 1990s, and no one knew how they came about; many suspected a backdoor was hidden in them. Anthropic's Claude found that they came from an ordinary random number program…(opens the original post in a new tab)
12. 11:49
    X@JamesZhang3724· Discussion

    Absurd… The origin of the NIST elliptic curve seeds had not been clearly explained for over twenty years. Claude traced it: 1990s lrand48, plus Unix timestamps from 1997–98. Not a backdoor, more like casually using a clock random number back then. The sense of security actually came back a little 👀 htt…(opens the original post in a new tab)
13. 11:44
    X@AYi_AInotes· Discussion

    To be honest, in the early hours of today something happened in the tech world that deserves a place in the history of computing, but most AI tech morning reports have not even had time to understand it. The top historical mystery that has troubled the global cryptography community for a full 26 years, and that countless conspiracy theories have speculated was a secret backdoor of the US National Security Agency, was completely solved by Claude in less than half an hour. ...(opens the original post in a new tab)
14. 10:42
    X@ohmohm· Discussion

    Claude ไขปริศนา 25 ปีของ seed เส้นโค้ง NIST P-256 สำเร็จ — ไม่ใช่ hash ของวลีลับ แต่เป็นเลขจาก lrand48 ที่ seed ด้วยเวล…(opens the original post in a new tab)
15. 07:32
    X@Garryjohn171416· Discussion

    🔥 Big news: AI cracks a mystery that has puzzled the cryptography community for 25 years. Claude took less than 30 minutes to trace the string of "random seeds" behind the NIST P-256 elliptic curve, provided by the NSA, back to a random number generator from the 1990s 💬 Quick take: a classic in cryptography…(opens the original post in a new tab)
16. 07:30
    X@iluciddreaming· Discussion

    The source of the seeds for those NIST ECDSA curves has been found: they were not hashed, but random numbers produced by lrand48 in a C library. Breaking down what Anthropic published: - The curves involved are P-192, P-224, P-256, P-384, P-52...(opens the original post in a new tab)
17. 07:00
    WeChatDoonsec· Media coverage

    Claude took only 30 minutes to crack the NSA's 25-year 'cryptography cold case'(opens the original post in a new tab)
18. 06:59
    WeChatWeChat · Wangkong Xianhua Plus· Media coverage

    Claude uncovers NSA's 25-year 'cryptography cold case' in just 30 minutes(opens the original post in a new tab)
19. 06:52
    X@janxin· Discussion

    The US NSA backdoor is confirmed https://www.anthropic.com/research/ecdsa-curve-origins(opens the original post in a new tab)
20. 05:24
    X@Dreamestraa· Discussion

    Not a break: a hidden backdoor is now much less plausible, since anyone can regenerate the seeds. B-163 and some base p…(opens the original post in a new tab)
21. 05:24
    X@Dreamestraa· Discussion

    Claude solved a 26-year-old crypto riddle in under 30 minutes: • NIST's curves like P-256 used seeds the NSA never exp…(opens the original post in a new tab)
22. 02:45
    X@BTCWires· Discussion

    Claude solved the 25-year NSA NIST elliptic curve mystery in under 30 minutes. Tracing P-256 seeds to a 1997 Unix C sc…(opens the original post in a new tab)
23. 02:01
    X@pirrer· Discussion

    The National Security Agency (hereinafter NSA) handed over a string of 40 characters of garbled code in the 1990s, and for more than twenty years no one could say where it came from. Anthropic announced this month that its Claude found the answer in less than half an hour: that string of garbled code was from a certain second on August 16, 1997…(opens the original post in a new tab)
24. 02:00
    X@XenoSpectrumJP· Discussion

    Claude solves a cryptographic mystery unsolved for about 30 years in under 30 minutes, revealing the origin of the "seed" for NIST standard curves https://xenospectrum.com/claude-nist-curve-seeds-origins(opens the original post in a new tab)
25. 01:31
    X@fernandoabishai· Discussion

    Anthropic's analysis of NIST P-256 seed parameters ends decades of suspicion regarding NSA backdoors by demonstrating t…(opens the original post in a new tab)
26. 01:11
    X@The_Cyber_News· Discussion

    🔐 Claude AI Solves 25-Year NSA Cryptography Mystery in Just 30 Minutes Details: https://cybersecuritynews.com/claude-…(opens the original post in a new tab)
27. 00:15
    X@QwenAIFans· Discussion

    the NSA gave NIST the seeds for P-256 and friends with zero explanation. 25 years of backdoor theories and a $36,864 bo…(opens the original post in a new tab)
28. 00:03
    X@brikk_· Discussion

    In under half an hour, Claude discovered the origins of the NIST P-192, P-224, P-256, P-384, and P-521 seeds. None of t…(opens the original post in a new tab)

1. 23:47
   X@dwkim601· Discussion

   Anthropic says Claude worked out where five NIST curve seeds came from in under half an hour. They're lrand48 output se…(opens the original post in a new tab)
2. 23:23
   X@iMalayTripathi· Discussion

   What a day to be alive! https://www.anthropic.com/research/ecdsa-curve-origins(opens the original post in a new tab)
3. 23:14
   X@PANewsCN· Discussion

   🤯 Claude solves the seed mystery of the NIST encryption curve in half an hour? It has nothing to do with cracking Bitcoin! Recently it has been rumored online that AI is about to crack Bitcoin! The trigger was an October 16 post by Anthropic stating that Claude took less than half an hour to figure out the… in the NIST P-256 encryption curve(opens the original post in a new tab)
4. 23:12
   X@99btc1· Discussion

   Anthropic disclosed on the 17th at Hong Kong time that its internal research model traced how the five NIST elliptic curve public "seeds" were generated: an old C library random number function plus a timestamp. The research also explains the origin of some base points and publicly releases reproduction code. The parameter provenance can be reproduced, giving cryptography research one more checkable piece of evidence. Wallet private...(opens the original post in a new tab)
5. 23:11
   X@AYi_AInotes· Discussion

   Amazing! An Anthropic internal research model, in less than 30 minutes, actually cracked the NSA elliptic curve seed mystery that had been dormant for over twenty years. Wow, that is truly eerie metacognition: at the first second of reaching the correct result, instead of immediately reporting it, it fell into self-doubt about "am I in a simulated test environment," ...(opens the original post in a new tab)
6. 23:10
   X@aiuorg· Discussion

   Claude uncovers origins of NIST ECDSA curve seeds, solving decades‑old mystery https://aiunderstanding.org/news/claude…(opens the original post in a new tab)
7. 22:42
   The Decoder

   Anthropic's Claude cracks NSA's 25-year-old cryptography puzzle in under 30 minutes

   Anthropic says its Claude solved the 25-year puzzle of the seed source for the ECDSA standard curves in under 30 minutes: the seeds were generated by the simple C random number generator lrand48, initialized with Unix timestamps between May 1997 and April 1998. When NIST standardized the ECDSA curves in 2000, the NSA provided these seeds without any explanation, which long fueled outside speculation about backdoors. Claude found that lrand48 outputs only 31 bits, and that the high-order bits of some seeds were systematically zero, thereby identifying the pattern. Anthropic says this makes a deliberate backdoor less likely, and donated the $36,864 bounty to the Internet Security Research Group.

8. 22:20
   X@ai_card_daily· Discussion

   Claude가 수십 년 동안 풀리지 않던 ECDSA 곡선 시드의 출처를 밝혀냈다. 답은 "그냥 타임스탬프"였다. ECDSA는 가장 널리 쓰이는 타원곡선 암호 표준이다. NIST가 2000년 FIPS 186-2에…(opens the original post in a new tab)
9. 21:49
   X@techtactician· Discussion

   Claude solved a decades-old crypto mystery in under 30 minutes. Anthropic says the NSA-supplied seeds for NIST curves…(opens the original post in a new tab)
10. 20:06
    WebQbitAI· Media coverage

    Claude solves a cryptographic mystery in half an hour; the academic community went astray for 20 years(opens the original post in a new tab)
11. 20:02
    X@vegeta9_· Discussion

    The "NSA elliptic curve backdoor" that the cryptography community speculated about for 25 years was solved by Claude in half an hour. The most paranoid group of scholars in all humanity imagined an advanced backdoor for 25 years; it turned out that Claude reverse-engineered the 1990s C standard library and found the truth was simply that a system time was casually used as a seed…(opens the original post in a new tab)
12. 19:58
    X@dapangdun· Discussion

    Some people say AI is about to crack $BTC again, but that is not the case. Let me explain. What Claude did this time is this: NIST P-256 is one of the elliptic curves. Previously, the seed was unknown, and because of the long-term lack of transparency, it was later suspected of having an NSA backdoor, especially the 2013 S...(opens the original post in a new tab)
13. 18:36
    X@Rus_Khairullin· Discussion

    Claude cracked a 25-year-old cryptography mystery in half an hour. There's a thing called ECDSA, a digital signature s…(opens the original post in a new tab)
14. 18:16
    X@mint_blancmanch· Discussion

    https://www.anthropic.com/research/ecdsa-curve-origins Funny lol The method for creating elliptic curve parameters for digital signatures used in ECDSA encryption had long been kept private, but Claud…(opens the original post in a new tab)
15. 18:16
    X@aislopgr· Discussion

    Claude solved a 25-year crypto mystery: the NIST ECDSA curve seeds were never a hash of some NSA in-joke, just the C li…(opens the original post in a new tab)
16. 18:01
    X@mylifcc· Discussion

    One of the biggest "conspiracy theories" in cryptography was solved in an extremely absurd yet hardcore way. The NIST P-256 elliptic curve, which has protected the global internet (HTTPS, digital signatures) for 25 years, had its initial seed C49D3608 86E70493... placed by the NSA (US National Security Agency)...(opens the original post in a new tab)
17. 17:56
    X@Dan_Jeffries1· Discussion

    The origins of ECDSA elliptical curves? "NIST P-192, P-224, P-256, P-384 and P-521 seeds...None of them were the resul…(opens the original post in a new tab)
18. 16:11
    X@SciTechera· Discussion

    AI is becoming a powerful tool for scientific investigation. CLAUDE AI JUST SOLVED A 25-YEAR-OLD CRYPTOGRAPHY MYSTERY.…(opens the original post in a new tab)
19. 16:03
    X@Joshua_WD· Discussion

    Anthropic says an internal model traced the NIST curve seeds to a 1990s random generator seeded with the clock, in unde…(opens the original post in a new tab)
20. 15:38
    X@coinacademy_fr· Discussion

    🚨 Claude révèle l’origine des seeds des courbes ECDSA de la NSA, un mystère vieux de 26 ans. Un modèle de recherche i…(opens the original post in a new tab)
21. 15:02
    X@MetaEraCN· Discussion

    Claude solves 25-year mystery of NIST curve seeds: derived from simple timestamp PRNG, not a backdoor. Anthropic engineer @sweis announced that Claude AI successfully solved the long-standing mystery of the NIST ECDSA curve seeds, linking to Anthropic's research report. Claude…(opens the original post in a new tab)
22. 15:01
    X@hmcls_· Discussion

    [클로드가 인터넷 암호 표준의 25년 된 숫자 출처를 찾아낸 과정] - 인터넷 서명에 쓰이는 미국 표준 암호 곡선은 출발점이 된 숫자의 출처가 설명되지 않아, 미국 정보기관 NSA가 자기들만 쓸 수 있는 약점(백…(opens the original post in a new tab)
23. 14:52
    WebSynced (Jiqizhixin)· Media coverage

    Just now, Claude solved a cryptography puzzle that had remained unsolved for over twenty years in half an hour.(opens the original post in a new tab)
24. 14:41
    X@bamboo4031· Discussion

    Claude, which solved how the cryptographic seed was determined: "ECDSA is the most widely used elliptic curve cryptography standard (omitted) The specification makes the 'seed' parameter public, but its origin was never explained or justified by the NSA...(opens the original post in a new tab)
25. 14:41
    WebcnBeta· Media coverage

    Claude solves a cryptography puzzle that stood for over twenty years in half an hour(opens the original post in a new tab)
26. 14:16
    X@_FORAB· Discussion

    The mystery of the NSA's secret seed, which had puzzled the cryptography community for over 25 years, was solved by Claude in half an hour. The key point is that the AI itself doubted the result afterward, wondering whether this finding was real or not 🤣. In the past, for internet security, the parameters of many elliptic curves widely used, especially ones like P-256, were never clear on how they were randomly generated...(opens the original post in a new tab)
27. 14:15
    X@luuu2024· Discussion

    A 25-year mystery in the cryptography community, Claude solved it in less than half an hour. The seeds of the NIST P-256 family of curves have long been suspected of having a backdoor: - Not a hash, but output of the C library lrand48 - Seed comes from a 1997-98 timestamp - 160 bits reproduced bit by bit Not...(opens the original post in a new tab)
28. 13:56
    X@LongContextHQ· Discussion

    1/10 A 25-year mystery. An NSA-linked cryptography standard. A $36,864 bounty. Anthropic says Claude traced the origina…(opens the original post in a new tab)
29. 13:22
    X@GRS815· Discussion

    In less than half an hour: @AnthropicAI says Claude found the source of the NIST elliptic curve seeds 1⃣ The seeds of the five curves P-192 through P-521 are not hashes, but output of the C library lrand48 random numbers, initialized with a timestamp 2⃣ The P-256 seed is a 19...(opens the original post in a new tab)
30. 12:30
    X@xk2324573703· Discussion

    Source: Anthropic official (times in UTC, reproduction code in the article) https://www.anthropic.com/research/ecdsa-curve-origins(opens the original post in a new tab)
31. 12:30
    X@xk2324573703· Discussion

    The string of "random numbers" that the cryptography community guessed for 25 years turns out to be: August 16, 1997, 01:52:34. The seed of the P-256 elliptic curve has never had its origin explained, and the most widely circulated theory was that it was the hash of a joke. Claude cracked it in less than half an hour: it's not a hash at all, it's the old C function lrand48...(opens the original post in a new tab)
32. 12:14
    X@jax_wu· Discussion

    The source of the NIST curve seeds, debated for twenty-five years, was uncovered by Claude in half an hour. lrand48 + Unix timestamps from 97, 98, that's it. Not a backdoor phrase, and nothing high-minded. The answer is ordinary enough to be a bit funny. Back then, many people suspected NSA was planting mines, and now it looks...(opens the original post in a new tab)
33. 12:12
    XX @AISafetyMemes· Discussion

    Claude solved a 25 year old NSA cryptography mystery in 30 minutes(opens the original post in a new tab)
34. 11:49
    X@xiax0603· Discussion

    🔥 Is cryptocurrency in danger? Claude solves the 25-year NIST elliptic curve mystery, re-examining the trust foundation of cryptography! NIST P-series elliptic curves support the ECDSA digital signatures that most cryptocurrencies and TLS certificates rely on. The seed source of these parameters has been mired in backdoor-related controversy for the past 25 years. An...(opens the original post in a new tab)
35. 11:28
    X@NFT_Chen· Discussion

    🚨Explosive! Cryptocurrency is in danger! Anthropic's internal Claude model took less than 30 minutes to crack the 25-year mystery of the NSA elliptic curve seeds that had puzzled the cryptography community! The internal model's chain of thought sends chills down your spine! These seeds are the foundation of Bitcoin, TLS, digital signatures, etc. The NSA provided them back then but never explained their…(opens the original post in a new tab)
36. 11:18
    X@NintendoDoomed· Discussion

    The 25-year backdoor mystery that the U.S. National Security Agency (NSA) planted in cryptography standards, Claude cracked in half an hour. Although BTC does not use this curve, the crypto world these days is full of surprises: yesterday it was AI accelerating quantum cracking, today it is AI digging up the old secrets of cryptography in half an hour. First, some background: ...(opens the original post in a new tab)
37. 11:13
    X@TechFlowPost· Discussion

    Recently, everyone has been anxious that with AI computing power advancing so fast, sooner or later it might directly crack cryptography and the public-private key system. Yesterday, a test disclosed by Anthropic provided a contrasting example for this concern: its internal model Claude took less than half an hour to solve the puzzle that had…(opens the original post in a new tab)
38. 10:47
    X@darcy_7minai· Discussion

    The NIST P-256 seed wasn't a hashed joke phrase. Anthropic says Claude traced it to C's lrand48, seeded with a 1997 Uni…(opens the original post in a new tab)
39. 10:31
    X@Dreammko· Discussion

    AI is really starting to solve long-standing scientific puzzles. Anthropic announced on October 16: Claude, in less than half an hour, traced the generation source of multiple NIST elliptic curve cryptographic parameters, finding they are related to an old random number generator and Unix timestamps. Note: this is not a crypt...(opens the original post in a new tab)
40. 10:27
    X@nftsiy· Discussion

    Anthropic had its internal research model Claude trace the origin of the NIST elliptic curve seeds, and in less than half an hour, it found the answer that had puzzled the cryptography community for over twenty years. Previously, several employees had investigated along the clue of a "joke hash" left by an NSA employee, but without results; this time, the question was not given to Claude…(opens the original post in a new tab)
41. 10:13
    WeChat · QbitAI

    Anthropic says Claude identified the seed sources of five NIST elliptic curves in half an hour

    According to Anthropic's disclosure, Claude took less than half an hour to determine how the seeds for NIST's five standard elliptic curves (P-192, P-224, P-256, P-384, P-521) were generated: the seeds came from the lrand48 pseudorandom number generator in a 1990s C library, initialized with a Unix timestamp. Claude wrote a scanning program to check the binary digits of the public seeds bit by bit, tested 34 combinations of generators and output truncation methods, and found that the highest bits of the 20 32-bit integers split from four groups of seeds were all 0, thereby pinpointing lrand48, and then used the LLL lattice basis reduction algorithm to recover the truncated state. Tracing back the initialization input of srand48 yielded a time range from May 1997 to April 1998; for P-256, this corresponds to August 16, 1997, UTC 01:52:34, and taking the 1842nd candidate group yielded a seed starting with C49D. The previously circulated claim was that the seeds came from the hash of a salary-increase joke password, and the bounty initiator has independently verified this result.

42. 09:33
    X@ai100news· Discussion

    [Claude, NIST elliptic curve 'seed' origin clarified] Anthropic announced that the long-mysterious values of standard curves such as P-256 came not from a hash but from the output of a 1990s C random number generator seeded with the time. The company's internal research model did it in under 30 minutes...(opens the original post in a new tab)
43. 09:32
    X@oragnes· Discussion

    25 years = 30 minutes, and this will become more and more common! Claude took less than 30 minutes to crack the 25-year cryptography mystery left by the NSA! In 2000, the US NIST adopted a set of elliptic curves with parameters provided by the NSA, including the famous P-256. Since the NSA never explained these mysterious...(opens the original post in a new tab)
44. 09:29
    X@idoubaody· Discussion

    Claude uncovered the true origins of the ECDSA curves! The mystery of the NIST curve seeds that has puzzled the cryptography world for 25 years has been cracked by Claude! The research found that the seeds of standard curves such as P-256 are not an NSA backdoor, but were generated in the 1990s using the outdated Irand48 and time…(opens the original post in a new tab)
45. 09:25
    X@ai_fengshou· Discussion

    The 25-year "NSA backdoor theory" was closed by AI in half an hour—the truth isn't a conspiracy, it's antique code. For that mysterious seed of the NIST curve, Anthropic had Claude trace it firsthand: it wasn't a hash cipher at all, but the 90s C library lrand48 casually using the computer clock as a seed...(opens the original post in a new tab)
46. 09:22
    X@Edward913413· Discussion

    Claude, in half an hour, solved a puzzle that the cryptography community had been guessing at for 25 years. NIST's P-256 elliptic curve is the security foundation used by HTTPS, digital signatures, and cryptocurrencies worldwide. Its parameters are generated from a seed hash, and this seed was given by the NSA back then, and its origin was never explained...(opens the original post in a new tab)
47. 09:10
    X@ja_akinyele· Discussion

    AI shedding light on the origins of the NIST EC seeds is a pretty remarkable result: "lrand48 random-number generator…(opens the original post in a new tab)
48. 07:37
    WeChat · Synced (Jiqizhixin)

    Anthropic announced that Claude solved a more-than-two-decade cryptography puzzle in half an hour

    Anthropic published a research result: an employee gave Claude's internal research model a problem that had troubled the cryptography community for more than two decades, and Claude traced the seed sources of NIST's P-192, P-224, P-256, P-384, and P-521 in less than half an hour, without receiving the previously rumored passphrase clues. These seeds were generated by the weak pseudorandom number generator lrand48 from the C library, with the initial state taken from a Unix timestamp; Claude scanned 34 combinations of random number generators and truncation methods, identified the feature that some seed high-order bits were zero, then exhaustively searched the hidden bits and used the LLL algorithm to recover the generator's internal state, and traced that the base points of 6 curves including P-192 came from the random number generator of the big integer software package FreeLIP. Anthropic said this finding did not break ECDSA and did not introduce a new attack method, but it reduced the possibility that the relevant curves were deliberately backdoored; the seed of the B-163 curve and the base point generation method of some curves still have no identified source.

49. 01:02
    Anthropic Red TeamingSelected

    Claude reveals the origin of the ECDSA curve parameters

    Anthropic says its internal research model Claude found in less than half an hour the origin of the seeds for the NIST P-192, P-224, P-256, P-384, and P-521 curves: they are not the output of a hash algorithm, but were produced by the C library lrand48 random number generator seeded with Unix timestamps. Anthropic employees posed this question in October 2026, and Claude identified the output characteristics of the 1990s PRNG, then used the LLL algorithm to recover the truncated linear congruential generator state, obtaining the timestamp corresponding to each seed; for example, P-256 required 1842 iterations. Claude also found that the six curve base points generated in 1997 came from FreeLIP's random number generator, with seeds from 20000 to 20517. The seed bounty of $36,864 will be donated to the Internet Security Research Group.

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