Shake well before use: Authentication based on Accelerometer Data

TitleShake well before use: Authentication based on Accelerometer Data
Publication TypeConference Paper
Year of Publication2007
AuthorsMayrhofer, R., & Gellersen H.
Conference NameProc. {Pervasive 2007}: 5th International Conference on Pervasive Computing
Date PublishedMay
Conference LocationBerlin, Heidelberg, Wien
ISBN Number978-3-540-72036-2

Small, mobile devices without user interfaces, such as Bluetooth headsets, often need to communicate securely over wireless networks. Active attacks can only be prevented by authenticating wireless communication, which is problematic when devices do not have any a priori information about each other. We introduce a new method for device-to-device authentication by shaking devices together. This paper describes two protocols for combining cryptographic authentication techniques with known methods of accelerometer data analysis to the effect of generating authenticated, secret keys. The protocols differ in their design, one being more conservative from a security point of view, while the other allows more dynamic interactions. Three experiments are used to optimize and validate our proposed authentication method.