Typing Fingerprint

Learn how each person types a phrase, the time each key is held and the time between keys, then tell who is typing from the rhythm alone

Learn who types

Name

Phrase

Everyone types the same one. A phrase typed every day, a name or an address, tells people apart best.

Type the phrase

Type it as you usually do, without hurrying, times. It goes on its own once the phrase is typed; Backspace is fine.

Esc: Start the phrase over

Result

Name	Distance	Against their own samples

Between keys Held

What differs most

Each person's profile is the time each key of the phrase is held and the time from one key to the next, averaged over their samples, with how much it varies. A distance counts how far a sample is from it, each gap measured in that person's own variation, so 1 is a usual gap (the scaled Manhattan distance, which did best among simple detectors in Killourhy and Maxion's 2009 comparison). A person's limit comes from their own samples, each compared to the others. Some banks and sites check the rhythm of a password or a form this way, without anything else. With a few samples it's a demonstration, not a lock: another keyboard, cold hands or a phrase learned by heart change a rhythm. Nothing is sent or kept: reloading the page forgets everyone.