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)
<> KD
Data Key
<> KDU
Data Key, Notarized
<> KK
Key - Encrypting Key
<> KKU
Key - Encrypting Key Notarized
<> MAC
Message Authentication Code
<> NOS
Notarization Flag
<> PKK
Key - Encrypting Key Pair (*KK)
<> PKKU
Key - Encrypting Key Pair, Notarized (*KKU)
<> SUBF
Subfield of Previous Field Tag (The Special Value SUBF Indicates that the Previous Field Tag (Other than SUBF) Has a Subfield and that the Accompanying Field Content is the Subfield Value without the ANSI X9.17 Subfield Delimiter ["."])
