An Optical Encryption Scheme that uses Polarization of Coherent Light
Unnikrishnan Gopinathan, David S. Monaghan, Thomas J. Naughton, John T. Sheridan · Frontiers in Optics · 2005
We demonstrate an optical system that encodes two dimensional data as different polarization states. The encrypted image is recorded using a digital holographic setup and the decryption is done numerically.