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Construction of General （k, n） Probabilistic Visual Cryptography Scheme

Ching-Nung、Yang、Chih-Cheng、Wu、Feng、Liu .

2011Acta Scientiarum Naturalium Universitatis SunyatseniComputer Science被引 3

摘要

Visual cryptography scheme (VCS) is a secure method that encrypts a secret image by subdividing it into shadow images. Due to the nature of encryption VCS is categorized into two types: the deterministic VCS (DVCS) and the probabilistic VCS (PVCS). For the DVCS, we use m (known as the pixel expansion) subpixels to represent a secret pixel. The PVCS uses only one subpixel to represent a secret pixel, while the quality of reconstructed image is degraded. A well-known construction of (k, n)-PVCS is obtained from the (k, n)-DVCS. In this paper, we show another construction of (k, n)-PVCS by extending the (k, k)-PVCS.

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