24 October 1997 Optical coding for storing confidential data
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Two cryptographic methods for storing graphic information are presented in this paper. The information is encoded by phase modulation or the angular coding. The information are read out by means of holographic interference. Without decoding card, no one can read out the information stored in the informational card.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Qizhong Huang, Qizhong Huang, Jinglei Du, Jinglei Du, Yongkang Guo, Yongkang Guo, Ding Wang, Ding Wang, } "Optical coding for storing confidential data", Proc. SPIE 3159, Algorithms, Devices, and Systems for Optical Information Processing, (24 October 1997); doi: 10.1117/12.279452; https://doi.org/10.1117/12.279452

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