How to hack time, with C2PA(da.vidbuchanan.co.uk)
50 points by Retr0id | 6 comments
Blog post by David Buchanan (retr0id) on manipulating or forging timestamps in C2PA content provenance metadata.
#digital-signatures on Hacker News
2 stories tagged digital-signatures, 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)
Forging 1024-bit RSA signatures in nearly SNFS time [pdf](eprint.iacr.org)
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.