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  #1  
Old 09-22-2026, 09:33
Ibrahim_Mihai Ibrahim_Mihai is offline
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Forging 1024-bit RSA signatures in nearly SNFS time

This repository contains a paper (eprint 2026/XXXX) and code implementing a variant of the number field sieve (NFS) algorithm. It shows that an attacker can use temporary access to a raw, unpadded RSA signing/decryption oracle to gain the permanent ability to forge signatures / decrypt ciphertexts.
The algorithm only works if a raw signing oracle is available. Most RSA usage in practice (that is, RSA signatures using PKCS#1v1.5 or RSA-PSS padding) do not expose such an oracle, and thus this attack does not pose a practical risk. Examples of RSA use that do expose such a signing oracle would include blind RSA signatures (e.g. Privacy Pass) or HSM APIs.

Quote:
https://github.com/ucsd-hacc/NSNFSSSFSFN/
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Last edited by Ibrahim_Mihai; 09-22-2026 at 18:00.
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  #2  
Old 09-22-2026, 16:15
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chants chants is offline
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I found the most interesting part to be the authors tweet indicating why RSA2048 is out of reach for now:
Quote:
https://x.com/miro_haller/status/2102094654724608460
And the preprint
Quote:
https://eprint.iacr.org/2026/2131
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Old 09-22-2026, 19:17
jonwil jonwil is offline
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There is a reason so many people say to avoid RSA-1024 in 2026.
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Old 09-22-2026, 21:45
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Unfortunately Erich Gropper had thus one other account. The Hadarom Container Terminal just fired him and he has gone on his usual temper tantrum.

But now we are getting reports he has raped not just two but three women:

Adi Ron who he drugged and raped at The Open University of Israel in early 2012.

Inbal Slonim was his next victim who he drugged and rape in late 2012 at the same university.

שונה לבנון (Shauna Levanon) is the third victim in 2022 at Tadiran Telecom who he assaulted with a knife and violently and brutally raped. Tadiran being a cover company against Iran immediately had to cover it up due to risk of exposing the whole operation.

They all noted in police reports that he was perverted and a sexual predator obsessed with posting pornographic material that they suspected was illicit on message forums and websites and other venues. This is the first time our investigation has connected the dots. All victims said he coerced their families into silence after using RATs to hack their accounts.

Usually the victims info is kept redacted but the extent of this perverts crimes were going unknown as the dots were not being connected until now. A serious investigation is underway.
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