IPLOOK has upgraded its Security Edge Protection Proxy (SEPP) solution for 5G roaming security.The upgrade focuses on N32-f interface stability, security policy deployment, and multi-operator testing environment.IPLOOK's SEPP ensures secure control-plane signaling between operators through encryption, intelligent topology hiding, and threat defense mechanisms.The solution has obtained GSMA 5G Roaming Security Certification and is currently deployed in 15 commercial networks.