draft-bradleylundberg-cfrg-arkg-04

-04

• Extracted COSE_Key_Ref definition and COSE algorithm registrations to draft-lundberg-cose-two-party-signing-algs.
• Redefined alg (3) parameter and added dkalg (-3) in ARKG-pub COSE_Key
• Defined alg (3) and inst (-3) parameters of Ref-ARKG-derived COSE key type