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A new research paper demonstrates a situational method for forging 1024-bit RSA signatures in nearly Special Number Field Sieve (SNFS) time by exploiting temporary access to a raw, unpadded RSA signing oracle. Rather than breaking RSA-1024 universally, the technique allows attackers to extract enough information during a session to generate future forgeries even after the private key becomes inaccessible. The researchers outline practical real-world scenarios where this vulnerability could be exploited, highlighting the ongoing risks of legacy textbook RSA implementations.

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