In today’s digital landscape, businesses face a growing challenge: how to secure customer accounts and transactions without compromising the user experience. Traditional authentication methods—like one-time passwords (OTPs) and third-party authenticator apps—have long been the standard. But they come with trade-offs that are increasingly difficult to justify.

The Problem with Conventional Authentication

While OTPs and authenticator apps offer a layer of security, they also introduce friction. Users are often redirected away from the app, forced to wait for SMS codes, or required to download additional software. These steps not only slow down the experience but can also lead to user frustration, drop-offs, and increased support costs.

Moreover, OTPs are less secure to phishing and social engineering attacks. Fraudsters can trick users into revealing passcodes or intercept messages, putting sensitive data and financial transactions at risk.

For businesses, this creates a dilemma: how to maintain robust security while keeping users engaged and satisfied.

What Modern Users Expect

Today’s users are more privacy-conscious and security-aware than ever. They want:

• Security that doesn’t interrupt their experience.
• Authentication that’s simple and intuitive.
• Verification methods that respect their privacy and data.
• Meeting these expectations requires a shift in how businesses think about identity verification.

A New Approach: Silent, Network-Based Authentication

One emerging solution is silent authentication—a method that verifies user identity without requiring active input. By leveraging mobile network data, businesses can confirm phone number possession in the background, eliminating the need for SMS messages, codes or app downloads.

This approach reduces friction, enhances security, and aligns with user expectations for seamless digital experience

Introducing Telstra’s Number Verification API

Telstra has taken this concept further with its Number Verification API, a new solution that verifies mobile number possession silently and securely using Telstra’s network infrastructure.

Here’s how it benefits businesses:

• No Interruptions: Users stay within your app—no redirects, no waiting.
• No Passcodes: Eliminates the need for 6-digit codes or SMS messages.
• No Downloads: Removes reliance on third-party authenticator apps.
• Reduced Phishing Risk: No passcodes for fraudsters to steal or trick users into revealing.

The API is inherently resistant to social engineering attacks and minimises user input, reducing common vulnerabilities while maintaining a frictionless experience.

For developers, IT and product teams, Telstra’s solution is easy to integrate and scalable across industries—from finance and retail to telecommunications and government services.

Why It Matters

As digital threats evolve and customer expectations rise, businesses must adopt smarter, more secure authentication methods. Telstra’s Number Verification API offers a future-ready solution that helps protect users and transactions without compromising usability.

It’s not just a technical upgrade—it’s a strategic investment in trust, security, and customer satisfaction.

To see the API specification visit our developer portal Telstra Number Verification API.

This article by Troy Larkings was originally published on telstra.com.au under the title: Rethinking Mobile Authentication: A Smarter, Safer Path for Businesses