Rapid and brief communication: Efficient encryption of wavelet-based coded color images

Authors:
Karl Martin;Rastislav Lukac;Konstantinos N. Plataniotis
Affiliations:
Multimedia Laboratory, The Edward S. Rogers Sr. Department of ECE, University of Toronto, 10 King's College Road Toronto, Ontario, M5S 3G4, Canada;Multimedia Laboratory, The Edward S. Rogers Sr. Department of ECE, University of Toronto, 10 King's College Road Toronto, Ontario, M5S 3G4, Canada;Multimedia Laboratory, The Edward S. Rogers Sr. Department of ECE, University of Toronto, 10 King's College Road Toronto, Ontario, M5S 3G4, Canada
Venue:
Pattern Recognition
Year:
2005

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Abstract

An efficient, secure color image coder incorporating Color-SPIHT (C-SPIHT) compression and partial encryption is presented. Confidentiality of the image data is achieved by encrypting only the significance bits of individual wavelet coefficients for K iterations of the C-SPIHT algorithm. By varying K, the level of confidentiality vs. processing overhead can be controlled. For K=2, adequate security is achieved and an average of only 0.40% of bits needed encrypting for test images coded at 0.8bpp.