03/12/2021
(ASC X12) 997 Hash or Authentication Code
TYPE=AN MIN=1 MAX=16
The message authentication code or hash/digest generated by the authentication process; when the Data Encryption Standard (DES) algorithm is used, the field consists of 4 hexadecimal coded characters (i.e., characters from the set 0..9, A..F), a separator character (space, “-“, or other), and 4 hexadecimally coded characters; when non-DES hashes are used, the result of the hash is expressed as hexadecimally coded characters without spaces; when authentication or hash is not used, this field should be filled with a non-blank character other than the set (0..9, A..F) for the minimum length
Appears in
| ANSI X12 EDI S3E | Security Trailer Level 1 |
| ANSI X12 EDI S4E | Security Trailer Level 2 |
| ANSI X12 EDI S1E | Security Trailer Level 1 |
| ANSI X12 EDI S2E | Security Trailer Level 2 |
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