Visual Cryptography for Image Privacy

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Provided by: Engineering Research Publication
Topic: Security
Format: PDF
Preserving the privacy of digital biometric data (e.g., face images) stored in a central database has become of paramount importance. This paper explores the possibility of using visual cryptography for imparting privacy to biometric data such as fingerprint images, iris codes and face images. In the case of faces, a private image is dithered into two host face images (known as sheets) that are stored in two separate database servers such that the private image can be revealed only when both sheets are simultaneously available; at the same time, the individual sheet images do not reveal the identity of the private image.
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