Securing of Two and Three Dimensional Information Based on In-line Digital Holography

A method that combines the high speed of digital encryption and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. The encryption is performed by use of multi-dimensional lock on the hologram plan, providing high security in the encrypted image and a key with many degrees of freedom. We described how our method can be adapted to encrypt either 2D or 3D information. Electronic decryption can be performed and a correlation method, which has several advantages over the FFT, used for reconstruction procedure. The most important of these advantages is that the width and the length of the hologram need not to be equal. This gives the proposed method a unique technique compared to any other security methods. Experimental results for both 2D and 3D information including setup are shown. Key-Words: Information security, computer generated holography, encryption, decryption, 3D virtual image .