Device fingerprint

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A device fingerprint is a string of data that maps and compiles details of a particular device or user, such as the operating system and browser information. Unlike an IP address, which is a singular piece of data that users can manipulate for privacy and security (such as using a VPN service or resetting network connection), a device fingerprint holds a series of specified data that can be uniquely attributed to a device or user, and are therefore much harder to protect from tracking and abuse of privacy.

Common data that may be included in a device fingerprint include:

• Device model and hardware
• Web browser
• Screen resolution
• Font type and size
• Plugins
• Browser extensions
• and many more

How it works

Fingerprinting works by getting a data item and turning it into a much shorter bit string that uniquely identifies itself. This includes the operating system, device model, screen resolution and more.

Why it is a problem

Fingerprinting can be used to identify individuals, flagging privacy concerns and letting companies do things like targeted advertising, selling personal data and more.

Examples

Some examples of fingerprinting include some types of cookies,