AI-based typing biometrics might be authentication’s next big thing


Identifying or authenticating people based on how they type is not a new idea, but thanks to advances in artificial intelligence it can now be done with a very high level of accuracy, making it a viable replacement for other forms of biometrics.

Research in the field of keystroke dynamics, also known as keyboard or typing biometrics, spans back over 20 years. The technique has already been used for various applications that need to differentiate among computer users, but its widespread adoption as a method of authentication has been held back by insufficient levels of accuracy.

Keystroke dynamics relies on unique patterns derived from the timing between key presses and releases during a person’s normal keyboard use. The accuracy for matching such typing-based “fingerprints” to individual persons by using traditional statistical analysis and mathematical equations varies around 60 percent to 70 percent, according to Raul Popa, CEO and data scientist at Romanian startup firm TypingDNA.

Some vendors have invested a lot of money over the past 10 years in an attempt to improve the precision of typing biometrics, but true success has only been achieved over the past two or three years due to advances in machine learning, Popa said.

Popa’s company has used these advances to develop AI-powered typing pattern recognition technology that it claims has an accuracy of more than 99 percent and can even reach 99.9 percent when there is a sufficiently large typing profile built for the user over time.

The technique involves recording small pieces of information about how users type, like the time it takes them to move from one key to another or the length of time they keep each key pressed. This is used to create unique typing patterns that are represented as feature vectors made up of 320 values.

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