The field tag that identifies a field contained in a cryptographic service message; the field tag identifies the contents of the accompanying Field Contents
Type
ID
Length
Max 4 / Min 2
Codes
<> CTA
Count, ``A''
<> CTB
Count, ``B''
<> CTP
Count, Pair
<> CTR
Count, ``R''
<> EDC
Error Detection Code
<> ERF
Error Field
<> IDA
Identity of Key for Authentication
<> IDC
Identity of Key Distribution Center (CKD) or Key Translation Center (CKT)
<> IDD
Discontinued Key Name
<> IDU
Identity of Ultimate Recipient (the Security Recipient)
