Behavioural verification is used to authenticate access to given devices, accounts or systems. The solution has been designed on the basis of machine learning mechanisms responsible for creating behavioural models – very advanced sets of unique user behaviour, distinguishing them from other people. We are talking about the speed of pressing buttons on the keyboard or mouse movements. This can be compared to traditional handwriting, because when we put letters on a page with a pen, each of us does it in a unique way. The angle of the letters, their size or shape is different. The same is true of typing on a stationary or mobile keyboard, which behavioural verification technology uses for authentication.