Learn More
Visual cryptography (VC) was introduced by Naor and Shamir. In general, a (k, n)-threshold scheme shares a given secret image S among n so-called shadow images. People can "view" the secret image by simply stacking any k of these n shadows (k < n is a threshold value). In most of the reported VC schemes, the size of each shadow is greater than that of S.(More)
  • 1