3 stories tagged cryptanalysis, newest first.
![Screenshot of eprint.iacr.org: Forging 1024-bit RSA signatures in nearly SNFS time [pdf]](https://hn.urlbox.com/shots/renders/2026/9/24/aded7927-67b5-4e0f-b84b-622f29ec4d18.jpg)
63 points by int0x29 | 11 comments
IACR ePrint paper implementing the Joux-Naccache-Thomé attack to forge 1024-bit RSA signatures via a signing oracle (an HSM) in roughly SNFS time.
718 points by sohkamyung | 431 comments
A cryptocellar.org write-up validating a break, attributed to OpenAI GPT-6 Astra, of the German Army Enigma message MVUEH of 10 July 1941, unsolved since 2005.
1150 points by u1hcw9nx | 528 comments
Vals AI blog post reporting that Claude Fable 5.1 solved the Cyphral Distich, an unsolved cipher from 1653, within a day when given it as an open task.