Visual Cryptography for Multiple Secrets - Visual Cryptography and Secret Image Sharing - page 89

(a) (b)

(c) (d)

FIGURE 3.23
Transforming circle shares (a) and (b) into cylinder counterparts (c) and (d),
respectively.

TABLE 3.10
Comparison of visual multiple secrets sharing schemes.

schemes x m contrast shares' shape

Wu and Chen [12] 2 4 1/4 square

Wu and Chang [13] 2 4 1/4 square

Feng et al.[3] 2 3x 1/3x cylinder

Shyu et al.[8] 2 2x 1/2x circle or

cylinder