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Bitstream-Based JPEG Encryption in Real-time

Stefan Auer, Alexander Bliem, Dominik Engel, Andreas Uhl and Andreas Unterweger
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Stefan Auer: Salzburg University of Applied Sciences, Salzburg, Austria
Alexander Bliem: Salzburg University of Applied Sciences, Salzburg, Austria
Dominik Engel: Salzburg University of Applied Sciences, Salzburg, Austria
Andreas Uhl: Department of Computer Sciences, University of Salzburg, Salzburg, Austria
Andreas Unterweger: Department of Computer Sciences, University of Salzburg, Salzburg, Austria

International Journal of Digital Crime and Forensics (IJDCF), 2013, vol. 5, issue 3, 1-14

Abstract: The authors propose a framework to encrypt Baseline JPEG files directly at bitstream level, i.e., without the need to recompress them. The authors’ approach enables encrypting more than 25 pictures per second in VGA resolution, allowing real-time operation in typical video surveillance applications. In addition, their approach preserves the length of the bitstream while being completely format-compliant. Furthermore, the authors show that an attack on the encryption process, which partly relies on AES, is practically infeasible.

Date: 2013
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