Xinwen Fu wrote:
Xinwen Fu wrote:
Hi,
Is there some implementation of elliptic curve cryptography in
openssl crypto?
Well there's some support for ecc in 0.9.8-dev. What do you need ?
In fact, I want to use elliptic curve cryptography (ECC) for
encrypting plaintext (just interested). But ECC has the
bad property: the size of the ciphertext is two times the size of the
plaintext. So if I encrypt the same plaintext for multiple times, the size
of ciphertext will increase exponentially. This is bad.
Is my analysis right?
Hmm, which encryption alg do you want to use ? The use of elliptic
curves does not determine some special encryption alg. In case you
want to use ECIES (currently not implemented in OpenSSL, see SEC 1)
your analysis is afaik not correct. Note: elliptic curves are normally
only used for the key exchange, but not for the actual encryption
(which is still done by well-known symmetric encryption algs).
Cheers,
Nils
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