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For the recreation of the original secret, all or some selected subsets of shares are needed individual shares are of no use on their own. Then encode this secret image into n shadow images called shares. This method converts the secret written material into an image. SECURE VISUAL SECRET SHARING BASED ON DISCRETE WAVELET TRANSFORMĭirectory of Open Access Journals (Sweden)įull Text Available Visual Cryptography Scheme (VCS is an encryption method to encode secret written materials. More precisely, we show that an identically self-dual matroid that is representable over a finite field induces a pure-state quantum- secret-sharing scheme with information rate 1.

In this context the present results prove to be useful they enable us to construct efficient quantum- secret-sharing schemes for many general access structures. While previous work has shown how to construct quantum- secret-sharing schemes for general access structures, these schemes are not claimed to be efficient. In addition to providing a new perspective on quantum- secret-sharing schemes, this characterization has important benefits. In this paper we take the first steps toward a matroidal characterization of quantum- secret-sharing schemes. No such relations are known for quantum secret-sharing schemes. Furthermore, access structures of such schemes can be characterized by an excluded minor relation. Classically, efficient secret-sharing schemes have been shown to be induced by matroids. International Nuclear Information System (INIS)Ī secret-sharing scheme is a cryptographic protocol to distribute a secret state in an encoded form among a group of players such that only authorized subsets of the players can reconstruct the secret. Matroids and quantum- secret-sharing schemes

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