A comprehensive engineering evaluation of 5G international roaming vulnerabilities, SEPP design, and hardware-accelerated JSON Web Encryption.
As 5G networks enable critical applications—autonomous cross-border logistics, connected vehicles, and remote medical consultation—the security of international roaming links becomes critical infrastructure. Traditional roaming vulnerabilities that permitted IMSI-catching and denial-of-service cannot be tolerated in 5G. The 3GPP specified the Security Edge Protection Proxy (SEPP) to terminate all inter-operator traffic.
PRINS allows mobile operators to establish end-to-end security while permitting intermediate IPX providers to perform legitimate traffic routing and SLA monitoring. TeleHSM executes PRINS encryption in hardware: data modification policies are negotiated over N32-c, and sensitive fields are encrypted using JWE over N32-f, with cryptographic verification that transit carriers only modify permitted header attributes.
SEPP instances rely on GSMA Root Certificate Authorities to authenticate foreign roaming partners. TeleHSM provides carrier-grade certificate lifecycle management, verifying partner certificate chains and OCSP revocation tokens in under 2 milliseconds.