3 Wei-Han Lee Xiaochen Liu Yilin Shen Hongxia Jin Ruby Lee 2017 Secure Pick Up: Implicit Authentication When You Start Using the Smartphone ACM Symposium on Access Control Models and Technologies (SACMAT) Indianapolis 06/21/2017 Authentication, Security, Privacy, Machine Learning, Smartphone, Dynamic Time Warping, Mobile System We propose Secure Pick Up (SPU), a convenient, lightweight, in-device, non-intrusive and automatic-learning system for smartphone user authentication. Operating in the background, our system implicitly observes usersâ phone pick-up movements, the way they bend their arms when they pick up a smartphone to interact with the device, to authenticate the users. Our SPU outperforms the state-of-the-art implicit authentication mechanisms in three main aspects: 1) SPU automatically learns the userâs behavioral pattern without requiring a large amount of training data (especially those of other users) as previous methods did, making it more deployable. Towards this end, we propose a weighted multi-dimensional Dynamic Time Warping (DTW) algorithm to effectively quantify similarities between usersâ pick-up movements; 2) SPU does not rely on a remote server for providing further computational power, making SPU efficient and usable even without network access; and 3) our system can adaptively update a userâs authentication model to accommodate userâs behavioral drift over time with negligible overhead. Through extensive experiments on real world datasets, we demonstrate that SPU can achieve authentication accuracy up to 96.3% with a very low latency of 2.4 milliseconds. It reduces the number of times a user has to do explicit authentication by 32.9%, while effectively defending against various attacks. 3 Wang, Michael Lee, Ruby B. 2007 Architecture for a Non-Copyable Disk (NCdisk) Using a Secret-Protection (SP) SoC Solution Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on Pacific Grove, CA, USA 1999-2003 11/04/2007 copyright, data privacy, system-on-chip Piracy of copyrighted digital contents, such as movies and music is rampant in cyberspace. A piece of digital material may be repeatedly copied and proliferated throughout the Internet with ease. We examined both software and hardware vulnerabilities in existing digital copy-protection methods. As a result, we propose a non-copyable disk (NCdisk) that makes it significantly harder for digital contents to be copied. Any digital content written onto the NCdisk can only be read through a predefined set of outputs of the NCdisk, and the original plaintext digital form may never be read out of the NCdisk. We add a minimal set of components based on the secret-protection (SP) architecture to the existing disk's SoC chipset to attribute the disk with the non-copyable property. We further present the security protocol to be used along with the NCdisk to provide a copy-protected digital movie download scenario. http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4487587