ACSAC '05 Proceedings of the 21st Annual Computer Security Applications Conference
PassShapes: utilizing stroke based authentication to increase password memorability
Proceedings of the 5th Nordic conference on Human-computer interaction: building bridges
Wave like an Egyptian: accelerometer based gesture recognition for culture specific interactions
BCS-HCI '08 Proceedings of the 22nd British HCI Group Annual Conference on People and Computers: Culture, Creativity, Interaction - Volume 1
Look into my eyes!: can you guess my password?
Proceedings of the 5th Symposium on Usable Privacy and Security
Exploring the Use of Discrete Gestures for Authentication
INTERACT '09 Proceedings of the 12th IFIP TC 13 International Conference on Human-Computer Interaction: Part II
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Using digital gadgets we authenticate ourselves regularly. Usually authentication relies on standard PIN or password but novel input hardware facilitates new authentication techniques. In this work we present an authentication mechanism based on body movements captured by a depth sensor. This idea is motivated by the cultural body movements used as welcoming gestures, especially by gang members (secret handshakes). Our authentication technique 'BroAuth' lets the user interact with a virtual partner to perform password input. This is done through touching target zones on the own body and on the body of a virtual partner. In this paper we focus on evaluating usability and security of onscreen feedback for such a system. Three different types of feedback were tested during the input process: Text-only (1D), abstract user representation (2D) and a virtual avatar (live 3D). The most detailed but most insecure 3D feedback performed much worse than the abstract input modalities. Input times and user opinions show that an abstract 2D representation is the best tradeoff between usability and security for such a system.