Additional Authenticated Data (AAD) for the MAC calculation – informative
Terms in italics in this Section 7.2.6 shall have the meanings as specified in Green Book.
The Green Book requires that the AAD used as input to the MAC calculation is the concatenation of:
SC II AK II transaction-id II originator-system-title II recipient-system-title II date-time II other-information II information to be protected
The Green Book also requires that, for the elements contributing to AAD, only the values of the octet strings are included. The Green Book defines octet strings within the general-ciphering service in ASN.1 as: