Why Is Caller Authentication Especially Important Right Now?

Caller authentication isn’t a brand-new concept and has been

Verifying a caller’s identity has been standard practice in call centers for decades.

But with phone fraud still on the rise, traditional authentication methods are no longer enough.

Let’s look at the reasons you should consider a more robust and future-proof way to authenticate your customers.

1. Identity fraud is at an all-time high

You’d think that with increasingly sophisticated security measures in place, we’d have gotten rid of or at least drastically reduced most instances of fraud by now.

Sadly, that’s far from the case.

According to Signicat’s “The Battle in the Dark 2025” report, fraud attempts across the EU are up 88% over the last four years. In the case of identity fraud in particular, that number is 69%.

Europol has urged a coordinated European response to caller ID spoofing, with phone calls and text messages accounting for 64% of the cases.

Finally, a whopping 70% of companies are reportedly victims of voice phishing (or “vishing”) attacks.

In short, fraud isn’t going anywhere, and fighting it requires better solutions.

2. Traditional verification is failing

Such a steep rise in fraud attempts might not have been such a big deal if traditional authentication methods were up to scratch.

But the reality is a bit less rosy.

This Google research on security questions from as far back as 2015 lists some not-so-comforting stats:

• With just a single attempt, a fraudster has an almost 20% chance to correctly guess an English speaker’s favorite food (it’s “pizza”).
• 40% of US English speakers couldn’t even recall the answers to their own secret questions.

So people are stuck either picking an easy-to-remember answer that a fraudster can guess or going with a trickier answer they might forget themselves.

Methods like social security numbers pose their own challenges and risks. Not only do they rely on sharing sensitive personal information via not-so-secure channels, but such details are often public.

For one, it’s easy to overhear or see someone’s SSN in everyday scenarios.

Even worse, such details are also occasionally exposed in mass data breaches.

In 2014, 900,000 Danish CPR numbers were leaked by the Ministry for Economic Affairs, and a software error at the Danish tax portal exposed 1.26 million taxpayer ID numbers to third parties.

There is a growing consensus that knowledge-based authentication has outlived its usefulness and is on its way out.

3. AI-powered fraud is a new threat

And then there’s AI.

For all its promising potential, AI also makes certain types of fraud much easier to pull off and renders traditionally “safe” authentication methods like voice and facial recognition less reliable.

Voice-cloning tools need just seconds of audio to replicate a person’s voice, making it trivial for a fraudster speaking to your call center agent to sound exactly like you. It’s no wonder that voice phishing attacks have jumped 442% year-over-year in 2024.

In the US alone, GenAI-enabled scams are projected to cost companies $40 billion by 2027, up from 12.3 billion in 2023.

AI can also craft convincing phishing emails, orchestrate attacks at scale, and assist with synthetic identity fraud, which has grown by 45% in 2024.

All of this calls for alternative ways to authenticate callers without relying on elements that can be deepfaked quite as easily.

4. Customer trust is eroding

All of these trends are terrible news for customer trust.

People are increasingly skeptical of phone calls as well as a company’s ability to protect their sensitive data.

That’s why 80% of unidentified calls go unanswered, and only 40% of consumers trust brands to keep their personal data secure.

This is a real problem for any business with a call center.

83% of people are concerned about sharing personal data in the first place.

In other words, your agent asking a customer to provide sensitive data over the phone may hurt the very trust you’re trying to build.

Modern caller authentication that relies on the use of eIDs may help break this cycle.

Speaking of which…

5. eID infrastructure is mature and ready

The good news is that we already have a solution to many of these problems.

National eIDs are near-universally adopted, especially across the Nordics:

• In Denmark, 97% of people above the age of 15 have an active MitID.
• In Sweden, that number is 99.9% for people aged 18 to 67 using BankID.
• 4.5 million Norwegians use BankID in a country of 5.6 million.
• Finally, 98% of working-age Finns have an e-ID.

That means your customers already use eIDs to access their bank, file taxes, and sign documents. They know and trust the process, and the app already lives on their phone.

Why not let them use the same trusted method when on call with one of your agents?

This isn’t a hypothetical scenario, by the way.

Swedes have been using BankID to authenticate themselves on calls for over 15 years.

It’s a proven concept with a rather straightforward implementation.

So the only question is: When are you going to make the switch?