JPEG Encryption
Author Alexander Bliem abliem.itsb-m2012@fh-salzburg.ac.at
Author Stefan Auer sauer.itsb-m2012@fh-salzburg.ac.at
Date 01.07.2013
Version 1.0
Brief: This is a minimal decoder for baseline JPEG images and includes a JPEG en- and decryption algorithm, based on an AES OFB-Mode pseudo random number generator. It accepts memory dumps of JPEG files as input and generates a memory dump of the encrypted JPEG image. All YCbCr subsampling schemes with power-of-two ratios are supported, as well as restart intervals. Progressive or lossless JPEG is not supported. For further details to the bit-stream-based encryption algorithm, as well as to run-time performance measurements see the following journal article: Stefan Auer, Alexander Bliem, Dominik Engel, Andreas Uhl, Andreas Unterweger, "Bitstream-based JPEG Encryption in Real-time". In Chang-Tsun Li (Ed.) International Journal of Digital Crime and Forensics, vol. 5(3), accepted.
The JPEG decoder is based on the nanoJPEG open source project containing the following license:
NanoJPEG -- KeyJ's Tiny Baseline JPEG Decoder version 1.3 (2012-03-05) by Martin J. Fiedler martin.fiedler@gmx.net
This software is published under the terms of KeyJ's Research License, version 0.2. Usage of this software is subject to the following conditions: 0. There's no warranty whatsoever. The author(s) of this software can not be held liable for any damages that occur when using this software.
- This software may be used freely for both non-commercial and commercial purposes.
- This software may be redistributed freely as long as no fees are charged for the distribution and this license information is included.
- This software may be modified freely except for this license information, which must not be changed in any way.
- If anything other than configuration, indentation or comments have been altered in the code, the original author(s) must receive a copy of the modified code.