Digital Holography for Security Applications

A survey of Digital Holography (DH) and its employment in different application fields is provided. This paper reviews the main principles of the DH focusing on the optical techniques for security purposes. Recording and processing of three dimensional data, secured storage data, the use of Multimedia Sensor Network (MSN) for encrypted data transmission, and thus remote reconstruction of 3D images, are relevant examples in which DH represents an attractive solution. In this work, the state of art and major research challenges for this type of applications are shown and at the end fundamental open issue are discussed in order to outline the future research trends in this topic.