Device fingerprinting

What is device fingerprinting?

Device fingerprinting is a fraud prevention technique used to identify and recognise a device based on its unique combination of characteristics, such as browser settings, operating system, device type, IP address, language preferences, and other technical attributes.

By combining these data points, payment providers and fraud prevention systems can create a device profile, or 'fingerprint', that helps distinguish one device from another. Device fingerprinting is commonly used in payment processing, account security, and fraud prevention.

How device fingerprinting works

When a user visits a website, application, or payment page, the system collects various technical signals from the device they are using. These signals are analysed to generate a fingerprint that can be associated with a particular device. The fingerprint can then be compared with previous activity to identify recognised devices, unusual behaviour, or potential fraud risks.

Unlike passwords or authentication methods, device fingerprinting works in the background and is typically invisible to the user.

How device fingerprinting is used in fraud prevention

Device fingerprinting helps payment providers and merchants assess transaction risk by providing additional context about customer behaviour.

Common use cases include:

• Detecting suspicious login attempts.
• Identifying account takeover attempts.
• Recognising previously known fraudulent devices.
• Supporting transaction risk scoring.
• Strengthening fraud prevention controls.

Device fingerprinting is often used alongside other fraud prevention tools such as behavioural analysis, 3D Secure, identity verification, and transaction monitoring.

Why device fingerprinting matters

Fraudsters frequently change payment credentials, accounts, and identities, but the devices they use can provide valuable risk signals. By helping businesses recognise trusted and suspicious devices, device fingerprinting can improve fraud detection while reducing unnecessary friction for legitimate customers. For this reason, it has become a common component of modern payment fraud prevention strategies.