Telefónica Backs New GSMA Standard for App-Aware 5G Network Slicing

Telefónica is celebrating the approval of a new GSMA standard that gives mobile operators a way to authenticate and authorize applications for 5G network slicing, a move the Spanish operator says will unlock differentiated services and strengthen security. The standard, called the App Token, was developed over two years by the GSMA's Terminal Steering Group, which includes 200 members across the mobile industry.

Telefónica led the initiative to create a uniform mechanism for operators to see which apps are using network slice resources, something they currently lack today because a device's operating system determines how applications send traffic to the network.

How the App Token Works

The App Token creates a common language for operators, OS vendors, and application developers. It uses anonymized identifiers so the network can verify which apps are allowed to use a slice without revealing the app's real identity to the core network, improving privacy and security.

• App Token authenticates and authorizes applications for slice access at the network level.
• It prevents fake or unauthorized apps from accessing critical services, reducing fraud.
• Operators can enforce service level agreements (SLAs) for enterprise customers with predictable performance.
• The mechanism enables dynamic application of URSP (UE Route Selection Policy) rules for better traffic management.
• It protects user privacy through anonymized identifiers, balancing control with confidentiality.

Implications for 5G Services and Security

The standard addresses a key limitation for operators looking to monetize 5G network slicing. Without visibility into which apps are using slices, telcos could not tailor offers to specific applications or guarantee performance for enterprise clients. The App Token changes that by giving operators control at the network level.

Telefónica expects the standard to enable new service offerings and improve security for both consumers and enterprises. The mechanism also protects against fraud by blocking unauthorized apps from accessing advanced or critical network services, the operator said. Next steps involve adoption by OS vendors and application developers, with Telefónica encouraging the wider ecosystem to implement the standard. The GSMA's approval marks a step toward more scalable and secure 5G slicing commercial deployments.