Defining Elliptic Curve Cryptography Algorithms for use with DKIM
NIST
DomainKeys Identified Mail (DKIM) uses digital signature to associate
a message with a given sending domain. Currently, there is only one
cryptography algorithm defined for use with DKIM (RSA). This
document defines four new elliptic curve cryptography algorithms for
use with DKIM. This will allow for algorithm agility if a weakness
is found in RSA, and allows for smaller key length to provide the
same digital signature strength.