An Implementation of Key-Based Digital Signal Steganography
IHW '01 Proceedings of the 4th International Workshop on Information Hiding
A steganographic method for images by pixel-value differencing
Pattern Recognition Letters
Increased capacity for information hiding using Walsh transform
Proceedings of the International Conference and Workshop on Emerging Trends in Technology
Increased cover capacity using advanced multiple LSB algorithms
Proceedings of the International Conference & Workshop on Emerging Trends in Technology
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Steganography, derived from Greek, literally means "covered writing". It includes a vast array of secret communications methods that conceal the message's very existence. These methods include invisible inks, microdots, character arrangement, digital signatures, covert channels, and spread spectrum communications. Pixel Value Differencing (PVD)[8] was proposed for gray scale images where two consecutive pixel pairs are formed and embedding capacity is decided based on difference in their values. This paper has extended PVD to 24 bit color images and also a new improved version of Least Significant Bit (LSB) method (Modified Kekre's Algorithm) which is also applied on 24 bit color images. The proposed method is simple for implementation when compared to PVD method and yet achieves a high embedding capacity and good imperceptibility.