GoKawiilResearchers demonstrate new attack cutting cost of breaking 1,024-bit RSA keys
A newly reported cryptanalysis technique can compromise 1,024-bit RSA encryption without fully factoring the key, requiring an estimated 1,380 CPU core-years of computation. That figure is far below the roughly 500,000 to 1 million CPU core-years previously estimated to factor such a key directly.
GoKawiil's interpretation of the reporting above, not reported fact.
If confirmed and reproducible, this could make attacks on older RSA key sizes far more practical for well-resourced adversaries, even though 1,024-bit RSA is already considered weak by modern standards. It may add pressure on organizations still using legacy 1,024-bit keys to migrate faster, though the real-world impact depends on how the technique generalizes beyond the specific case tested.
- The technique bypasses full factoring while still breaking 1,024-bit RSA
- Computational cost drops from ~500,000-1,000,000 to 1,380 CPU core-years
- Highlights ongoing risk for systems still relying on outdated RSA key sizes
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Published there as: “New Technique Bypasses 1,024-Bit RSA Without Factoring It”
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