Multidimensional data encryption with digital holography

A new method based on the concept of virtual optics for both encryption and decryption is proposed. It analyzes the potential reasons of the limitations of our earlier work and presents some new approach to improve the original algorithm. Different methods of numerical reconstruction for data encryption are compared, the limitations caused by oft-axis setups are discussed, and the resolution of the decrypted image could be flexibly adjusted, which makes it possible to decrypt the image with virtually no loss of data. Numerical experiments are performed to validate the proposed method, and sensitivities of some parameters are quantitatively analyzed and illustrated. (C) 2002 Elsevier Science B.V. All rights reserved.