Mun-Kyu Lee, Jin O. Park, Jeong Eun Song. User Authentication Based on Distance Estimation Using Ultrasonic Sensors. In 2008 International Conference on Computational Intelligence and Security, CIS 2008, 13-17 December 2008, Suzhou, China, Volume 2, Workshop Papers. pages 391-394, IEEE Computer Society, 2008. [doi]
Abstract is missing.