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I want to use an asymmetric cryptography algorithm, but I need it have short Key Size(not like RSA which is at least 384). I need it to be about around 20. Is it possible?
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Standard asymmetric encryption algorithms are RSA, Diffie-Hellman, ECC, El Gamal, and DSA.
The most common asymmetric cipher currently in use is RSA, which is fully supported by the . NET Security Framework. Ron Rivest, Adi Shamir, and Leonard Adleman invented the RSA cipher in 1978 in response to the ideas proposed by Hellman, Diffie, and Merkel.
RSA (Rivest Shamir Adleman) — RSA is considered one of the most secure (and commonly used) asymmetric key encryption algorithms. It's virtually uncrackable using modern computers.
That's a .NET restriction on the key size; RSA can be used with any key size. It just doesn't make sense to do so.
Think about it, with a 20-bit key you can brute force the it in 2^20 attempts and that's just too easy with today's computers.
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