Network APIs and Digital Identity: Where Does Mobile Network Trust Fit?

Digital services have traditionally relied on passwords, OTPs and application-level authentication. But mobile operators already have an established relationship between the subscriber, SIM, device and network.

This creates another opportunity for Network APIs:

Can network-level trust become part of the digital identity experience?

From Subscriber Relationship to Digital Trust

The basic model can be represented as:

Subscriber → SIM → Device → Mobile Network → Verification

A digital service does not need to understand the telecom infrastructure behind that relationship. It can consume a verification result through a modern interface.

PAiCore’s Entitlement Configuration Server Lite (ECS Lite) is built around the GSMA TS.43 specification and uses native SIM-based EAP-AKA authentication to verify device identity without user intervention. This provides a foundation for authentication and entitlement workflows.

This can support use cases such as:

• Silent authentication
• Number verification
• Device-based trust
• Service entitlement
• Digital identity workflows

Why This Is More Than Another OTP

The opportunity is not simply to replace one authentication mechanism with another. It is to use an existing network-level trust relationship as part of the digital service.

Instead of:

User → SMS OTP → Application

the model can move toward:

Device → Mobile Network → Authentication Result → Application

The network remains part of the trust chain while the application receives the result it needs.

PAiCore describes ECS Lite as supporting Silent Network Authentication (SNA) through SIM-based authentication, enabling number verification without relying on traditional SMS OTPs. The architecture uses cryptographic proof credentials associated with the device to support transparent authentication.

From Authentication to Device Entitlement

ECS Lite is not limited to authentication.

PAiCore positions ECS Lite as a central orchestration layer between the operator’s core infrastructure and the native operating systems of smartphones and wearables. It communicates with the device’s built-in Entitlement Client through a GSMA TS.43-compliant architecture.

This allows the platform to support automated provisioning of operator services such as:

• VoLTE
• VoWiFi
• 5G capabilities

The result is a closer connection between the subscriber, device and operator network, without requiring the user to manually configure supported services.

Where Does ECS Lite Fit?

The authentication and entitlement process can be represented as:

Application → Authentication / Entitlement Layer → ECS Lite → Mobile Network → Device

ECS Lite provides the layer connecting operator network infrastructure with device-side authentication and entitlement mechanisms.

PAiCore also lists SS7/MAP and Diameter STa integration options, allowing ECS Lite to connect with existing mobile core infrastructure.

This is important because the objective is not to replace the existing mobile network. Instead, ECS Lite provides a way to work with the authentication and entitlement capabilities already present within the operator environment.

Why Network-Level Trust Matters

Application-level authentication often depends on information entered or supplied by the user.

Network-based authentication can use the existing relationship between the SIM, device and mobile subscription.

This creates another model:

Existing Network Trust → Authentication → Digital Service

For enterprises, this can provide another way to approach identity and number verification.

For operators, it creates an opportunity to make existing authentication assets available to digital services.

The broader architecture can therefore connect:

Digital Application → Network API → Authentication / Entitlement Infrastructure → Mobile Network

The application remains focused on the digital experience, while the underlying network infrastructure handles the network-side authentication and entitlement processes.

The Resulting Architecture Can Be Viewed As

Digital Service → Authentication / Entitlement Layer → ECS Lite → Mobile Network → SIM / Device → Verification Result

The application receives the authentication or verification outcome it needs without directly managing the underlying telecom authentication process.

This creates a bridge between mobile network trust and modern digital identity workflows.

Explore PAiCore

The PAiCore ECS Lite provides the authentication and entitlement layer for SIM-based authentication and device service provisioning.

Explore the PAiCore ECS Lite product page

You can also explore the PAiCore Network API Gateway, which connects modern API applications with telecom network capabilities.

Explore the PAiCore Network API Gateway

Explore Network API Aggregation

Standards and industry references

• CAMARA — Number Verification
• GSMA Open Gateway — Number Verification API
• GSMA — Understanding Network APIs
• GSMA — Open Gateway API Descriptions

The mobile network already has a trusted relationship with the subscriber. The opportunity is to make that trust useful to digital services.