Silent Network Authentication - replaces SMS OTP
Authenticate mobile users the right way – securely, in real-time with minimum friction.
A SMARTER, SAFER WAY TO AUTHENTICATE MOBILE USERS
Silent Network Authentication (SNA) lets a business verify a mobile number, quickly and securely, without the user doing anything. The check runs via a direct API call to the user’s mobile network operator, returns a binary Yes or No in just a few seconds, and requires no PIN code, no user action, and nothing for an attacker to phish. It is the authentication mechanism that sits inside every mobile network — the same cryptographic infrastructure that authenticates 5 billion mobile subscribers every day, now available to businesses via API.
Why It Matters
The modern authentication method that’s easier for users and safer for business.
- Streamlined UX
No more frustrated users abandoning signup flows or getting locked out due to a failed OTP. With SNA, the verification step is fast, invisible, and effortless - keeping your users engaged and happy.
- Stronger Security
IDlayr Secure SNA verifies a mobile number directly with the Mobile Network Operator, in real time, over a secure, encrypted connection to give a 100% certain result - no guesswork.
- Lower Fraud
Eliminating SMS OTP codes and passwords stops phishing, social engineering and man-in-the-middle attacks, preventing bad actors from faking user identities, taking over accounts and stealing funds.
How it works
IDlayr Secure SNA is the modern way to authenticate mobile users. It works silently in the background – with no passwords, no codes, and no user effort.
Here’s what happens:
- A user enters their mobile number on your app or website.
- The number is passed to IDlayr via API.
- IDlayr connects with the MNO over a secure, encrypted connection to verify the mobile number in real-time.
- IDlayr provides a binary (Yes / No) response - no false positives.
- You will know that it is the: Right mobile number, on a Real SIM card, Right Now!
- Once the verification completes the user is authenticated and can continue their online journey seamlessly.
How businesses are using SNA
- Banking
Strengthen security and ensure compliance.
Prevent phishing and account takeover attacks, whilst streamlining user onboarding and login.
- eCommerce
Increase conversion, reduce fraud.
Streamline the checkout experience while improving security with silent network authentication.
- Healthcare
Protect user data & ensure compliance.
Prevent unauthorized access to user accounts, secure personal health records.
Silent Network Authentication verifies a user’s mobile number by querying their mobile network operator directly. The MNO checks whether the phone number being claimed matches the SIM card in the user’s device. The check is silent — the user does nothing — and returns a binary Yes/No response in just a few seconds.
When a business initiates an SNA check, the request goes to the mobile network operator via API. The check from the mobile device passes to the mobile network over the mobile data channel. So, the MNO can ‘see’ the SIM card and the mobile IP address assigned to it. The MNO then compares the submitted phone number with the phone number that is mapped to that SIM on its network. If they match, the check passes. If they don’t — due to an incorrectly entered number, or a SIM swap, port-out, or number recycling — the check fails.
From the user’s perspective, nothing happens. No code to wait for, no message to read, no PIN to type. The authentication runs silently in the background, typically completing in just a few seconds. The user continues their journey uninterrupted.
SMS OTP sends a one-time code to a phone number and relies on the user reading and entering it correctly. It is phishable, susceptible to SIM Swap fraud, and creates friction that causes abandonment. SNA verifies a mobile number based on possession of the SIM card. This happens at the network layer, with no user action required and no credential for an attacker to intercept or phish.
Yes. SNA does not send a credential to the user, so there is nothing for an attacker to intercept, relay, or socially engineer. The check happens directly between the business and the mobile network operator. Phishing relay attacks, social engineering, and SS7 interception — all effective against SMS OTP — have no attack surface against SNA.
Many markets in Europe, USA, LatAm and Asia are already covered. Mobile networks are steadily rolling out SNA, so coverage is continuing to improve. IDlayr is already live across 20+ markets including USA, Europe, LatAm and Asia.
SNA requires the cellular data path. When a mobile device is connected to Wi-Fi, the IDlayr SDK temporarily routes the SNA check over the cellular network without user action. On a device with no active cellular connection, SNA cannot complete and a fallback is triggered automatically.
Yes, the technology works in exactly the same way, regardless of whether you use a physical SIM or an eSIM.
SNA verifies that the correct SIM is in the device right now. SIM Swap detection checks whether the SIM-to-number binding was recently changed — flagging accounts where a swap occurred before a high-value transaction. They are complementary controls. For high-value onboarding, step-up authentication, and account recovery, both together is the recommended architecture.
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