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An asymmetric (e.g. public-key) cryptosystem, based on modular exponentiation with big exponents and modulus. RSA can be used both for signature and encryption with proper paddings.

12 votes
1 answer
1k views

If RSA is only used to encrypt symmetric keys which are random, what's wrong with textbook RSA?

But if RSA is only used to encrypt symmetric keys, what's wrong with using only textbook RSA because random keys are very unlikely to repeat? …
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2 votes
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44 views

Are there UFDs where the factorization problem is difficult but finding irreducibles is cheap?

It could provide an alternative ring to do RSA/Rabin over. A suggestion is the polynomial ring over $\Bbb Z_{pq}$ where $p$ and $q$ are prime. …
wlad's user avatar
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