## What is Silent Network Authentication?

Socure’s Silent Network Authentication confirms in-session possession of a mobile phone number using real-time mobile operator signals. When SNA is unavailable, One-Time Passcode (OTP) serves as a ubiquitous, configurable fallback.

## How it works

Socure gives you a unique, one-time use, time-bound URL to initiate on the phone. The phone starts a data session and the SIM and mobile operator authenticate the phone number from that session using special cryptographic keys that protect the $3 Trillion global wireless network. This authentication happens without any end-user intervention, so the authentication is frictionless (great user experience) and 100% secure and deterministic since there is no PIN that can be intercepted by a third party. Socure can confirm with the mobile operator in a server-to-server call whether the actual phone number engaged in the data session matches what the end-user claims they possess.

SNA is deployed through Socure’s Digital Intelligence SDKs for iOS, Android, or React Native, and leveraged as an enrichment module in RiskOS™.

| Enrichment | Input fields | Signals returned | Coverage | Best for |
| --- | --- | --- | --- | --- |
| **SNA** | Phone number (via device with active SIM) | - Confirmed phone number possession via mobile operator network<br>- Authentication status (success, fail, unavailable)<br>- Fallback eligibility to SMS OTP | Major mobile operators (usually no MVNOs) in the countries listed below | High-assurance, low-friction phone number possession verification |

## Availability

**Available for users in:**

🇨🇦Canada

🇫🇷France

🇩🇪Germany

🇮🇩Indonesia

🇮🇹Italy

🇳🇱Netherlands

🇵🇭Philippines

🇸🇬Singapore

🇪🇸Spain

🇬🇧United Kingdom

🇺🇸United States

## When to use Silent Network Authentication

- New account creation, especially for higher conversion
- Logins for greater security, better conversion due to reduced authentication friction, and lower operational costs (no more "I'm having trouble with my OTP" customer service calls)
- Fast check-out transactions due to reduced authentication friction

## Natural product pairings

- Since not every mobile operator supports SNA, you should configure SNA as the first option and then fall back to SMS OTP when there is no coverage.
- If you have a sensitive transaction (e.g. large money transfer, access to health or legal records, or change of contact information) then adding a SIM swap check might be appropriate. With some effort, fraudsters can claim ownership over a phone number by socially engineering a SIM swap from a mobile operator, so adding a SIM swap check will give you assurance that the phone number possession check is legitimate.

## Integration

Provision SNA

Ensure your account is provisioned for the `SilentNetworkAuth` feature.

Integrate SDK

Use the Digital Intelligence SDK for iOS, Android, or React Native. Add `android.permission.CHANGE_NETWORK_STATE` to Android manifest.

Workflow setup

Add SNA as an enrichment module in RiskOS™ workflows alongside OTP or other identity checks.

## Operational notes

- SNA validation may take 1 - 4 seconds — display an interstitial screen in mobile apps during processing.
- Device must have an active SIM card and cellular data enabled.
- Devices on Wi-Fi will automatically switch to cellular for authentication.
- Devices without SIM or cellular connectivity will not complete authentication (status is still reported).
- Currently supported only in select countries (see the current list above).
- Requires mobile operator approval for the use case.