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Our Project Title is

VISUAL CRYPTOGRAPHY SCHEME WITH TWO TIER AUTHENTICATION

Authors : KM.Akbar Basha , A.Almas Khan and S.Arun

Taken Base Paper Title: A Probabilistic Model of Visual Cryptography Scheme with Dynamic Group.

Abstract:

 The (t , n) visual cryptography (VC) is a secret sharing scheme where a secret image is encoded into n transparencies, and the stacking of any out of transparencies reveals the secret image. The stacking of t-1 or fewer transparencies is unable to extract any information about the secret. This project discusses the addition and deletion of users in a dynamic user group. To reduce the overhead of generating and distributing transparencies in user changes, this project proposes a (t, n) VC scheme with unlimited n based on the probabilistic model. The propose scheme allows n to change dynamically in order to include new transparencies without regenerating and distributing the original transparencies. Specifically, an extended VC scheme based on basis matrices and a probabilistic model is proposed. An equation is derived from the fundamental definitions of the (t, n) VC scheme, and then the    (t, ∞) VC scheme achieving maximal contracts can be designed by using the derived equation. The maximal contrasts with t = 2 to 6 are explicitly solved in this project.