> From: Mohan Kumar [mailto:mohan...@gmail.com] > Sent: Friday, April 24, 2015 1:40 AM > > As per wiki > page, http://www.bouncycastle.org/wiki/pages/viewpage.action?pageId=36 > 2269, NIST (aliases for SEC curves) supports only P-224, P-256, P-384,P-521. i > couldn't find P-192. whether bouncy castle supports P-192 or not? > > thanks in advance.
I don't have the answer to your question, but in EC, the cryptographic strength is about half the number of bits, so 192 would have a cryptographic strength of 96, which is not considered strong enough in the present world. 224 would have the strength of 112, which is about the same as RSA 2048, which is still good enough for many purposes now, but not much longer. The recommended sizes to use are 256 and larger, which correspond to cryptographic strength of 128 or larger, roughly equivalent to RSA 3072 or 4096. Please note, 521 is not a type-o.
