Dr. Jan Christop Vorbrueggen Profile

Dr. Jan Christop Vorbrueggen

at MediaSec Technologies GmbH

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Proceedings Article | 29 April 2002 Paper

Digital watermarking for secure and adaptive teleconferencing

Jan Vorbrueggen, Niels Thorwirth

Proceedings Volume 4675, (2002) https://doi.org/10.1117/12.465312

KEYWORDS: Digital watermarking, Network security, Video, Information security, Computer programming, Network architectures, Video compression, Multimedia, Computer security, Data storage

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The EC-sponsored project ANDROID aims to develop a management system for secure active networks. Active network means allowing the network's customers to execute code (Java-based so-called proxylets) on parts of the network infrastructure. Secure means that the network operator nonetheless retains full control over the network and its resources, and that proxylets use ANDROID-developed facilities to provide secure applications. Management is based on policies and allows autonomous, distributed decisions and actions to be taken. Proxylets interface with the system via policies; among actions they can take is controlling execution of other proxylets or redirection of network traffic. Secure teleconferencing is used as the application to demonstrate the approach's advantages. A way to control a teleconference's data streams is to use digital watermarking of the video, audio and/or shared-whiteboard streams, providing an imperceptible and inseparable side channel that delivers information from originating or intermediate stations to downstream stations. Depending on the information carried by the watermark, these stations can take many different actions. Examples are forwarding decisions based on security classifications (possibly time-varying) at security boundaries, set-up and tear-down of virtual private networks, intelligent and adaptive transcoding, recorder or playback control (e.g., speaking off the record), copyright protection, and sender authentication.

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