(Student contribution) ASPS: an authentication scheme using pre-formed visual cryptographic shares

Authors:
Kunal Sain;Mradula Sharma;Suneeta Agarwal
Affiliations:
Motilal Nehru National Institute of Technology;Motilal Nehru National Institute of Technology, Allahabad, India;Motilal Nehru National Institute of Technology, Allahabad, India
Venue:
Proceedings of the Fifth International Conference on Security of Information and Networks
Year:
2012

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Abstract

In 1995, Naor and Shamir proposed a technique of secret sharing, called visual cryptography. In visual cryptography, the secret message is divided into shares which are copied onto transparencies and given to participants. In general k-out-of-n visual cryptography, at-least k of the n shares belonging to a qualified set need to be stacked together to reveal any information about the secret message. In this paper, utilising this property of general k-out-of-n visual cryptography, we propose an efficient method for formation of shares based on pre-formed shares. We also show how such a method can be applied for the purpose of authentication and cheater detection.