Abstract
Abstract Sharing secrets and safeguarding them while being sent over insecure channel is a crucial matter. Visual Cryptography still has the strong potential to secure this critical issue. In this paper, a new master key (n,n) visual cryptography scheme is proposed. The novelty of the proposed scheme is the generation of the master key using Station-to-Station Diffie Hellman algorithm. Moreover, one or more hierarchical shares could be generated for each secret image depending on the degree of security required. The performance of the shares generation technique is compared to others where it proves to be more robust to attacks. The algorithm satisfies all the basics of security: confidentiality, integrity and availability. This was evaluated by different tests like histograms, and entropy. Its security was analyzed against other vulnerabilities by evaluating the effect of man in middle attack and Evesdropping. Experimental results demonstrate that the scheme is highly secure.
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