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| This segment group shall be used to identify a party in the security process and to give security information for the referenced EDIFACT structure. |
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Function: |
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To refer to the secured EDIFACT structure and its associated date and time.
Dependency Notes:
1. D5(050,040) If first, then all
2. D1(070,090) One and only one
3. D5(060,040) If first, then all
4. D5(080,070) If first, then all |
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EAN |
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Interchange control reference |
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M |
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Unique reference number of interchange containing the data to which the security service was applied (UNB, DE 0020). |
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R |
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Interchange sender identification |
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M |
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Identification of the party sending the interchange which contains the data to which security services were applied. It is recommended to use GLN - Format n13. |
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Identification code qualifier |
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R |
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Interchange sender internal identification |
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N |
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Interchange sender internal sub-identification |
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N |
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R |
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Interchange recipient identification |
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M |
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Identification of the party receiving the interchange which contains the data to which security services were applied. It is recommended to use GLN - Format n13. |
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Identification code qualifier |
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R |
* |
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Interchange recipient internal identification |
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N |
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Interchange recipient internal sub-identification |
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N |
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D |
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Reference to a message group (UNG to UNE) containing data to which the security service was applied (UNG, DE 0048). |
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APPLICATION SENDER IDENTIFICATION |
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N |
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Application sender identification |
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Identification code qualifier |
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APPLICATION RECIPIENT IDENTIFICATION |
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N |
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Application recipient identification |
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Identification code qualifier |
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D |
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Reference number of a message (UNH to UNT) to which the security service was applied (UNH, DE 0062 of this message). |
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N |
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Controlling agency, coded |
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Association assigned code |
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Code list directory version number |
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Message type sub-function identification |
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N |
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N |
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Segment Notes: |
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This segment shall contain references to EDIFACT structures (i.e., interchanges, groups or messages) to which security services were applied.
The USX segment of the AUTACK message refers to a whole interchange, a message group within this interchange or a message in the interchange. Any reference made has to be non-ambiguous; if necessary the reference on a higher hierarchical level has to be indicated.
The USX segment enables the use following references:
· DE 0020 Interchange reference number
· DE 0048 Group reference number
· DE 0062 Message reference number
Application of the interchange reference number of the UNB segment:
Definition: Unique reference number generated by the sender in order to identify the interchange to which security services were applied or which contains messages or groups to which security services were applied.
The message recipient can combine the interchange reference number (DE 0020) and the sender identification (DE 0004) in order to ensure unambiguousness of the reference.
The interchange reference number as the only reference number is used if the security function (i.e., the digital signature) applies to the whole interchange. If the reference data and the AUTACK message are sent in different interchanges, then the interchange reference number is also mandatory, if the security function applies to groups or messages. If the reference data (messages or groups) and the AUTACK message are sent in the same interchange, the interchange reference number is not necessary.
Application of the group reference number of the UNG segment:
Definition: Unique reference number of a group of messages within an interchange to which security services were applied.
In this case to the USX segment refers to the unambiguous group reference number of the sender within an interchange. The group reference number is used if the security function (i.e., the digital signature) was applied to a group of messages.
Application of the message reference number of the UNH segment:
Definition: Unique reference number of a message within an interchange to which the security service was applied, generated by the sender.
In this case to the USX segment refers to the unambiguous message reference number of the sender within an interchange.
If the security service applies to every single message,
1) a separate AUTACK message needs to be sent for every message
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2) the segment group 3 (USX/USY) has to be repeated for every message
A separate AUTACK message for every message is necessary, if the messages on their way to the recipient are forwarded within another interchange (e.g., distribution by a clearing centre).
Example:
USX+DAT001+5412345123450:14+5411234512300:14+GRP002+++MES003' |
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