Tapasi Bhattacharjee

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This paper presents an image secret sharing method based on some random matrices that acts as a key for secret sharing. The technique allows a secret image to be divided into four image shares with each share individually looks meaningless. To reconstruct the secret image all four shares have to be used. Any subset m (1< m ≤ 4) shares cannot get sufficient(More)
In this paper, we propose a novel and simple (2, n) secret sharing scheme with precise reconstruction for grayscale, binary and color image. The share construction phase is based on pixel division and XOR operation. The reconstruction is based on XOR and OR operation. The proposed scheme has no pixel expansion and can reconstruct the secret image precisely.(More)
Reversible watermarking (RW) is used to embed some useful information into digital content in a reversible manner, where the reconstruction of the original image is highly desirable. This reversibility is important for almost all sensitive image application domains such as medical and military fields. To this aim here we have proposed a hybrid algorithm(More)
Secret sharing is a means of data protection by splitting it into few noise-like shares. However, transmission of shares (digital information), through radio mobile channel, experience the multipath effect called the fading effect that sometimes leads to severe degradation in the quality of the reconstructed data. This paper proposes a strong threshold (n,(More)
This paper proposes a joint secret sharing and data hiding scheme to serve the purpose of progressive quality access control on digital images. A gray scale secret image is divided into noise-like shares using bit plane modulation. Individual share is then embedded into respective cover images (from a set of images) in DCT domain using m-ary spread spectrum(More)
The " International Journal of Pharma and Bio Sciences " (IJPBS) is an international journal in English published quarterly. The aim of IJPBS is to publish peer reviewed research and review articles rapidly without delay in the developing field of pharmaceutical and biological sciences ABSTRACT In an environmental setup both humans and animals are exposed(More)
— Secret sharing method divides a secret into some components called shadow images where each shadow image looks meaningless. Based on this idea, we propose a simple secret image sharing scheme in this article. This scheme is based on bitwise operations. We have used matrix addition and subtraction processes for share generation and reconstruction processes(More)
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