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Can anybody elaborate on the idea that for RSA <=2048 is potentially unsafe? Is it true? It seems that even 1024 bit keys haven't been factored yet, much less 2048, so why use anything else currently?

https://en.m.wikipedia.org/wiki/RSA_Factoring_Challenge#The_...



I want someone to explain this too -- the article does not give any strong evidence that RSA <= 2048 is unsafe.




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