SPIE Proceedings [SPIE International Conference on Optical Instruments and Technology (OIT2011) - Beijing, China (Sunday 6 November 2011)] 2011 International Conference on Optical Instruments and Technology: Solid State Lighting and Display Technologies, Holography, Speckle Pattern Interferometry, and Micro/Nano Manufacturing and Metrolo - Three-dimensional information encryption with optical asymmetric cryptography and digital interferometry