A security researcher says that behavioural biometrics data gleaned from a user's mouse movements could be used to identify people on Tor.Jose Carlos Norte says that the movements can be tracked using Javascript, a ubiquitous coding language on the web that is enabled by default in Tor Browser.”Every user moves the mouse in a unique way,” Norte, who's the CTO of Barcelona-based startup eyeOS, told Motherboard. “If you can observe those movements in enough pages the user visits outside of Tor, you can create a unique fingerprint for that user. Then you can identify him inside of Tor, based on how he or she uses the mouse.”The researcher has created a proof of concept of this technique, showing the kind of unique data a mouse movement creates, and how that could be used to “fingerprint” a user.
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