AUT

Authentication Result. The EDIFACT segment that carries the cryptographic result of message validation.

Definition

The AUT (Authentication Result) segment carries the value of an authentication calculation applied to a message or interchange. It typically accompanies ISO 9735-5 security services (authentication, integrity, non-repudiation).

Origin

AUT is defined by UN/CEFACT and fits within the security services framework of ISO 9735 Part 5 (Security rules for batch EDI). It was added to allow a hash result or a signature to be included in a pre-XML EDIFACT message.

Example in context

AUT+9A4F5C82E1D6+3'

Here, 9A4F5C82E1D6 is the authentication result value, and 3 qualifies the algorithm used (for example SHA-1).

Related terms

• ISO 9735 — the EDIFACT syntax standard, whose Part 5 describes security services.
• Non-repudiation — cryptographic property AUT helps provide.
• Segment — the atomic unit of an EDIFACT message.