A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Geometric Hashing: An Overview
IEEE Computational Science & Engineering
Smart-Its Friends: A Technique for Users to Easily Establish Connections between Smart Artefacts
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
Synchronous gestures for multiple persons and computers
Proceedings of the 16th annual ACM symposium on User interface software and technology
A gesture-based authentication scheme for untrusted public terminals
Proceedings of the 17th annual ACM symposium on User interface software and technology
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Shake them up!: a movement-based pairing protocol for CPU-constrained devices
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Certificate revocation and certificate update
SSYM'98 Proceedings of the 7th conference on USENIX Security Symposium - Volume 7
Bluetooth: vision, goals, and architecture
ACM SIGMOBILE Mobile Computing and Communications Review
Repairing the bluetooth pairing protocol
Proceedings of the 13th international conference on Security protocols
A clustering based approach to perceptual image hashing
IEEE Transactions on Information Forensics and Security
Robust and secure image hashing
IEEE Transactions on Information Forensics and Security
User evaluation of lightweight user authentication with a single tri-axis accelerometer
Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services
uWave: Accelerometer-based personalized gesture recognition and its applications
Pervasive and Mobile Computing
A framework for secure device pairing by demonstration of physical proximity
Proceedings of the 8th International Conference on Frontiers of Information Technology
SAPHE: simple accelerometer based wireless pairing with heuristic trees
Proceedings of the 10th International Conference on Advances in Mobile Computing & Multimedia
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Device pairing is a significant problem for a large class of increasingly popular resource-constrained wireless protocols such as Bluetooth. The objective of pairing is to establish a secure wireless communication channel between two specific devices without a public-key infrastructure, a secure near-field communication channel, or electrical contact. We use a surprising user-device interaction as a solution to this problem. By adding an accelerometer, a device can sense its motion in a Cartesian space relative to the inertial space. The idea is to have two devices in a fixed, relative position to each other. Then, the joint object is moved randomly in 3D for several seconds. The unique motion generates approximately the same distinct signal at the accelerometers. The difference between the signals in the two inertially conjoined sensors should be relatively small under normal motion induced manually. The objective is to derive a deterministic key at both sides with maximized entropy that will be used as a private key for symmetric encryption. Currently, our prototype produces between 10-15 bits of entropy per second of usual manual motion using off-the-shelf components.