Data hiding in scrambled images: A new double layer security data hiding technique

Authors:
Shabir A. Parah;Javaid A. Sheikh;Abdul M. Hafiz;G. M. Bhat
Affiliations:
Post Graduate Department of Electronics and Instrumentation Technology, University of Kashmir, Srinagar, Jammu and Kashmir 190006, India;Post Graduate Department of Electronics and Instrumentation Technology, University of Kashmir, Srinagar, Jammu and Kashmir 190006, India;Post Graduate Department of Electronics and Instrumentation Technology, University of Kashmir, Srinagar, Jammu and Kashmir 190006, India;University Science Instrumentation Center, University of Kashmir, Srinagar, Jammu and Kashmir 190006, India
Venue:
Computers and Electrical Engineering
Year:
2014

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Abstract

The contemporary multimedia and communication technology has made it possible to replicate and distribute digital media easier and faster. This ease of availability causes the problem of exposing transmitted digital data on the network with the risk of being copied or intercepted illegally. Many cryptographic techniques are in vogue to encrypt the data before transmission to avert any security problems. However, disguised appearance of the encrypted data makes the adversary suspicious and increases the chances of malicious attack. In such a scenario data hiding has received significant attention as an alternate way to ensure data security. This paper presents a data hiding technique based on the concepts of scrambling and pseudorandom data hiding; to provide a data hiding system with two layer security to the embedded data, and good perceptual transparency of the stego images. The proposed system uses the novel concept of embedding the secret data in scrambled (encrypted) cover images. The data embedding is carried out in the Intermediate Significant and least significant bit planes of encrypted image at the predetermined locations pointed to by Pseudorandom Address Space (PAS) and Address Space Direction Pointer (ASDP). Experimental results prove the efficacy of scheme viz-a-viz various parameters of interest.