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Data Hiding by LSB Substitution Using Genetic Optimal Key-Permutation

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Author(s): Marghny Mohamed | Fadwa Al-Afari | Mohamed Bamatraf

Journal: International Arab Journal of e-Technology
ISSN 1997-6364

Volume: 2;
Issue: 1;
Start page: 11;
Date: 2011;
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Keywords: Steganography | LSB substitution | Cryptography | Genetic Algorithm.

ABSTRACT
The least significant bit (LSB) embedding method is one of the most commonly used techniques; it targets the LSB'sof the host image to hide the data. This paper deals with three main steganography challenges (i.e. capacity, imperceptibility,and security). This is achieved by hybrid data hiding scheme incorporates LSB technique with a key-permutation method. Thepaper also proposes an optimal key permutation method using genetic algorithms for best key selection. Both normal andoptimized methods are tested with standard images, varying both data size as well as key space. Final experimental resultsshow decrement in computation time when increasing number of keys, at the same time system security improves.
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