Fingerprints, facial scans and iris patterns have become standard tools for unlocking our digital lives. Whether they’re used to prove our identities to use a smartphone, pass through airport gates or verify bank accounts, biometrics are not just streamlining access; they are becoming entrenched in how we live and work online.

With this growing reliance, their value is soaring. Some experts therefore believe these personal data points may soon eclipse the worth of conventional financial assets. This prompts urgent conversation about the associated privacy risks, the emerging underground markets for stolen biometrics, and the accountability of organisations handling such data.

It’s becoming increasingly important to understand what is fuelling biometrics’ ascent and how to secure this emerging form of digital wealth.

Why features of biometrics overtake passwords

Biometric technology delivers a level of identity verification that passwords, PINs and tokens struggle to match, anchored in a person’s unique physical traits. Fingerprints, facial geometry and irises are far more difficult to replicate than traditional credentials. Crucially, these identifiers cannot be easily reset, simultaneously their greatest strength and most significant vulnerability.

In the UK, the adoption of biometrics has surged. Banks and fintech firms encourage customers to log in through fingerprints or facial recognition, citing convenience and security. Meanwhile, biometric passports at UK airports are cutting queue times and offering a glimpse into how identity checks may evolve across other sectors.

From a business perspective, biometrics have a broad appeal. Fraud is more complex if a criminal cannot simply guess or steal digits. Meanwhile, customers appreciate the simplicity of scanning a fingerprint rather than juggling multiple login details. This combination of security and convenience has given biometric identifiers an economic value that rivals payment cards or cash.

A growing privacy dilemma

What makes biometric data ideal for day-to-day transactions also makes it problematic from a privacy perspective.

Unlike compromised passwords or credit card numbers, biometric attributes cannot be reset. If a database of facial scans is breached, victims cannot simply “change” their faces to regain control of their information, adding an entirely new dimension to cybersecurity.

A case in point is the BioStar 2 breach, where a central biometric security platform left over a million people’s fingerprints and facial recognition data exposed on an unprotected server. Incidents like this are particularly alarming because a single breach places individuals at permanent risk, enabling criminals to create fake fingerprints or exploit stolen face templates.

Furthermore, misuse of facial recognition in public spaces can erode fundamental rights, enabling authorities or private companies to track individuals secretly. With UK regulators already scrutinising facial recognition in law enforcement and public venues and as biometrics become more entrenched, the ethical and legal boundaries around its usage will grow more contentious.

Criminals cashing in on biometric data

Wherever there is value, criminal activity tends to follow. While stolen credit card details and personal data have long been traded online, biometric information is fast becoming a high-value commodity.

On the dark web, “fingerprint kits” and facial image databases now sell for significant sums. A stolen credit card can be cancelled, but a hacked fingerprint is forever.

In some online marketplaces, criminals sell “selfie with ID” packages, bundling a victim’s photograph, personal details, and other documentation. These packages enable fraudsters to defeat facial recognition checks used by banks, cryptocurrency exchanges or government services. 

Given the intensity of security around biometrics, these bundles fetch higher prices than typical account credentials. This shift shows that shady marketplaces have realised stolen biometrics aren’t just a one-off windfall; they’re the gift that keeps giving to identity thieves.

Protecting biometric data under UK law

UK legislation classifies biometric data as sensitive personal information. Organisations that collect it are required to obtain clear consent, justify its use, and implement protections such as encryption and limited retention. Failing to meet these standards can lead to hefty penalties from the ICO.

A potential solution to this is storing said data directly on personal devices rather than central servers to limit the damage a large-scale breach can cause. Yet this is not a common practice in the industry.

Compliance with the law is not enough on its own to build public confidence. Firms relying on biometric checks should explain precisely how they gather data, who has access and when it will be deleted. Transparency helps prevent backlash and lawsuits; one mistake can severely harm a company’s image.

Those handling fingerprints or facial templates have a high duty of care: they must restrict database access and run regular security checks. A few developers use “cancellable” biometrics which lets them invalidate compromised data, though this approach remains uncommon.

Equally important is alerting users at once if a breach happens. Concealing problems only deepens the harm, whereas prompt, honest disclosure can preserve goodwill and set a business apart in a crowded marketplace.

Looking ahead: securing the biometric economy

As biometric authentication becomes standard across sectors like banking and healthcare, the risks will grow. Criminals are increasingly targeting these identifiers, while researchers continue to develop defences such as liveness detection and AI-led fraud prevention.

UK regulators like the ICO must keep evolving their guidance, while broader updates to GDPR may be needed to address emerging threats like deepfakes and synthetic identities. If biometrics are becoming the digital economy’s new currency, they’ll require oversight equal to that of financial data.

Handled responsibly, biometrics offer real security and convenience; but success depends on transparency, minimal data collection and swift breach response, critical to maintaining trust in this powerful technology.  

Paul Inglis General Manager of EMEA Ping Identity