Password based authentication systems face many problems in today’s time. Data breaches and users selecting weak passwords raised the need for different authentication methods or a second factor. Popular methods include fingerprint or face detection and second factors like access or transaction codes. But there are less explored systems that use keystroke dynamics authentication.

In this bachelor thesis we analyze existing keystroke dynamics authentication systems. To get a better understanding we implement such a system. Using datasets that are publicly available our system reaches a false acceptance rate (FAR) of 14 % and a false rejection rate (FRR) of 28 %. Having an own keystroke dynamics authentication systems we can then perform an evaluation in terms of usability in practice. Based on this evaluation we discuss in which cases such a system is a suitable and secure way for authentication.

We conclude that in general keystroke dynamics authentication systems are a convenient and secure way for an additional security factor. But we also distinguish existing challenges like when users have different computers (with different keyboards) or use auto-fill functions of password managers. And we state ideas on how our system’s performance could be improved and challenges could be faced.