Curve Names By Organization

Elliptic curves are widely used, despite being defined and described differently by different groups in the cryptographic world. The following table attempts to reconcile curve names across three different standards organizations, the SEC Group, ANSI, and NIST.

Table 1: Equivalent curves defined by standards organizations
SECG ANSI X9.62 NIST
 sect163k1    NIST K-163
 sect163r1    
 sect163r2    NIST B-163
 sect193r1    
 sect193r2    
 sect233k1    NIST K-233
 sect233r1    NIST B-233
 sect239k1    
 sect283k1    NIST K-283
 sect283r1    NIST B-283
 sect409k1    NIST K-409
 sect409r1    NIST B-409
 sect571k1    NIST K-571
 sect571r1    NIST B-571
 secp160k1    
 secp160r1    
 secp160r2    
 secp192k1    
 secp192r1 prime192v1  NIST P-192
 secp224k1    
 secp224r1    NIST P-224
 secp256k1    
 secp256r1 prime256v1  NIST P-256
 secp256r1    NIST P-384
 secp521r1    NIST P-521

For additional information about the Elliptic Curve specification, see this article:  

http://www.ietf.org/rfc/rfc4492.txt