Visual Cryptography & Threshold Schemes

By Doug Stinson

Dr. Dobb's Journal April 1998

Figure 4: The original, four shares, and some reconstructed images: (a) share s₁; (b) original image; (c) share s₂. (d) s₁+s₂; (e) s₃; (f) s₃+s₄; (g) share s₄: (h) s₁+s₃.

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