We discuss the problem of preserving the privacy of a digital face image stored in a central database. In the
proposed scheme, a private face image is dithered into two host face images such that it can be revealed only
when both host images are simultaneously available; at the same time, the individual host images do not reveal
the identity of the original image. In order to accomplish this, we appeal to the field of Visual Cryptography.
Experimental results confirm the following: (a) the possibility of hiding a private face image in two unrelated
host face images; (b) the successful matching of face images that are reconstructed by superimposing the host
images; and (c) the inability of the host images, known as sheets, to reveal the identity of the secret face image.