There's a new way to break RSA that's faster than anything we've seen before
Summary
Researchers have found a new way to break RSA encryption using regular computers faster than before. This method can create fake RSA signatures without cracking the keys, lowering RSA’s security much more than experts expected.Key Facts
- RSA encryption is widely used but known to be vulnerable in the future when quantum computers arrive.
- New research shows a classical (non-quantum) method that can break RSA keys faster by forging signatures.
- This method reduces the security level of 1024-, 2048-, and 4096-bit RSA keys to much lower values than recommended.
- The attack mainly affects blind-signature versions of RSA, which some systems like Privacy Pass still use.
- Privacy Pass is used by companies such as Apple and Cloudflare for anonymous user authentication.
- Breaking Privacy Pass with this method would need control of a target server and generating about 8.8 trillion fake signatures.
- Most current RSA systems use padding methods (PKCS or PSS) that protect against this attack.
- The research suggests stronger computing tools like AI or GPUs could make this attack even more efficient in the future.
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