Phase-Modulated Optical System With Sparse Representation for Information Encoding and Authentication

IEEE Photonics Journal

Wen Chen¹  Adrian Stern²  Bahram Javidi³  Xudong Chen⁴ 

[1] $^{1}$ Department of Electrical and Computer Engineering, National University of Singapore , Singapore;$^{2}$ Department of Electro-Optical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel;$^{3}$ Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT, USA;Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore;

关键词: Imaging systems;    security and encryption;   

DOI  :  10.1109/JPHOT.2013.2258144

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown