Users can be uniquely fingerprinted based on: [6] Typing speed. Exactly when each key is located and pressed (seek time), how long it is held down before release (hold time), and when the next key is pressed (flight time). How long the breaks/pauses are in typing. How many errors are made and the most common errors produced. How errors are corrected during the drafting of material. The type of local keyboard that is being used. Whether they are likely right or left-handed. Rapidity of letter sequencing indicating the user's likely native language.