What standard is used for the ECDSA to verify transactions? Bitcoin used Elliptic Curve Digital Signature Algorithm. (see here). I'm wondering what standard is actually used for this Algorithm: which curve? which prime? Can anybody give me a reference? (Wiki gives this, is this the standard that the ECDSA in Bitcoin?) Anywhere I can find an update on this?

Edit: A bunch of curves are given in page 87 of this. Is bitcoin using one of these?
I just found the answer from https://en.bitcoin.it/wiki/Protocol_specification#Signatures:


  For ECDSA the secp256k1 curve from http://www.secg.org/collateral/sec2_final.pdf is used.


i.e. the curve is 


  y^2 = x^3 - 7 


and the prime 


  p = 2^256 - 2^32 - 2^9 - 2^8 - 2^7 - 2^6 - 2^4 - 1. 


See here for more information.