name: OCSP
full_form: Online Certificate Status Protocol
context: Before the first registration of the NFp in the NRF, the NFp should get the OCSP stapling for its EE certificate from the OCSP server, and then embed this information as part of the NF profile registered in the NRF. The OCSP stapling contains the validity and revocation status of the EE certificate provided by the OCSP server, despite its initial validity availed from the CA. The OCSP server will always have the latest information about the NF certificate status. The OCSP stapling of the EE certificate can be updated by the periodic requests from the NF to the OCSP server, or by preconfigured OCSP server policies. The OCSP stapling updates should trigger the corresponding update of the information in the NF profile within the NRF. Figure 6.11.2-1 illustrates the procedure: Figure 6.11.2-1: OCSP stapling procedure for NFp validation in NRF 1) NFp sends a OCSP stapling request for its EE certificate to OCSP server. 2) OCSP server sends the OCSP stapling response to NFp with the latest
description: The Online Certificate Status Protocol (OCSP) is a protocol used for obtaining the revocation status of an X.509 digital certificate. It provides a real-time mechanism to check if a certificate has been revoked, acting as an alternative to Certificate Revocation Lists (CRLs). OCSP is frequently employed in conjunction with other protocols like TLS to ensure secure communication.
explanation: The text describes OCSP as a protocol used for checking the revocation status of digital certificates. Protocols define rules and formats for data exchange in telecommunications, making OCSP a clear example of this entity type.
section_title: 6.11.2	Solution details
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