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MOBICOM
2015
ACM

Kaleido: You Can Watch It But Cannot Record It

6 years 5 months ago
Kaleido: You Can Watch It But Cannot Record It
Recently a number of systems have been developed to implement and improve the visual communication over screen-camera links. In this paper we study an opposite problem: how to prevent unauthorized users from videotaping a video played on a screen, such as in a theater, while do not affect the viewing experience of legitimate audiences. We propose and develop a light-weight hardware-free system, called KALEIDO, that ensures these properties by taking advantage of the limited disparities between the screen-eye channel and the screen-camera channel. KALEIDO does not require any extra hardware and is purely based on re-encoding the original video frame into multiple frames used for displaying. We extensively test our system KALEIDO using a variety of smartphone cameras. Our experiments confirm that KALEIDO preserves the high-quality screen-eye channel while reducing the secondary screen-camera channel quality significantly. Categories and Subject Descriptors C.21 [Network Architecture a...
Lan Zhang, Cheng Bo, Jiahui Hou, Xiang-Yang Li, Yu
Added 14 Apr 2016
Updated 14 Apr 2016
Type Journal
Year 2015
Where MOBICOM
Authors Lan Zhang, Cheng Bo, Jiahui Hou, Xiang-Yang Li, Yu Wang, Kebin Liu, Yunhao Liu
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