Please use this identifier to cite or link to this item: https://doi.org/10.1109/JPHOT.2013.2258144
Title: Phase-modulated optical system with sparse representation for information encoding and authentication
Authors: Chen, W. 
Chen, X. 
Stern, A.
Javidi, B.
Keywords: Imaging systems
security and encryption
Issue Date: 2013
Source: Chen, W., Chen, X., Stern, A., Javidi, B. (2013). Phase-modulated optical system with sparse representation for information encoding and authentication. IEEE Photonics Journal 5 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1109/JPHOT.2013.2258144
Abstract: We develop a phase-modulated optical system with sparse representation for information encoding and authentication. The optical cryptosystem is developed with cascaded phase-only masks, and the plaintext is encoded into the cascaded phase-only masks based on an iterative phase retrieval algorithm during the encryption. Two simple strategies are developed to generate sparse data: The sparse data are randomly generated from the extracted phase-only masks, and sparse data are randomly generated from the plaintext. These two sparsity strategies are respectively used in the proposed optical security system, and the decrypted images cannot visually render information about the plaintext. Optical authentication method is further applied to verify the decrypted images. It is illustrated that the optical authentication operation with sparsity strategy can provide an additional security layer for the optical security system. © 2009-2012 IEEE.
Source Title: IEEE Photonics Journal
URI: http://scholarbank.nus.edu.sg/handle/10635/57050
ISSN: 19430655
DOI: 10.1109/JPHOT.2013.2258144
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