name: SEG
full_form: Security Gateway
context: error and abort the procedure. - During connection initiation, the initiating Operator A's SEG A provides its own SEG certificate and the corresponding digital signature in the IKE_AUTH exchange for IKEv2; - SEG A receives the remote SEG B certificate and signature; - SEG A verifies the remote SEG B signature; - SEG A checks the validity of the SEG B certificate by a revocation check to Operator Bâs CRL databases or OCSP server. If a SEG cannot successfully perform the revocation check, it shall treat this as an error and abort tunnel establishment; - SEG A verifies the SEG B certificate by executing the following actions: - SEG A fetches the cross-certificate for Operator B's SEG CA from Operator A's Certificate Repository or from a local cache. - SEG A checks the validity of the cross-certificate for Operator B's SEG CA by a revocation check to Operator A's Interconnection CA CRL database or OCSP server. If a SEG cannot successfully perform the revocation check, it shall treat this
description: A Security Gateway (SEG) is a network function responsible for securing and managing communication between different networks or domains. It performs tasks such as verifying digital signatures, checking certificate validity, and revocation checks to ensure secure tunnel establishment.
explanation: The context describes the SEG's role in securing communication between operators' networks, specifically highlighting its involvement in IKEv2 exchanges, certificate verification, and revocation checks. This justifies classifying SEG as a Network Function, given its critical role in controlling and managing network security.
section_title: 5.2.2.1.1	NDS/IP case for the Za interface
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biotag_Description: O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O