Design of Cascaded Phase Keys for a Hierarchical Security System
Applied Optics, Vol. 41, Issue 29, pp. 6128-6134 (2002)
http://dx.doi.org/10.1364/AO.41.006128
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Abstract
An image cryptosystem based on multiple phase-only masks is proposed. The proposed cryptosystem is a hierarchical security system that can use multiple phase keys to retrieve different amounts of data. In addition to the sequential order of the phase keys, the distance parameters among the phase keys are introduced to increase the system security. Even when an illegal user steals all the phase keys, the system cannot be broken without the correct sequential order and the distance parameters. However, the proposed system can verify the identities of the persons by the cascaded structure for the phase keys to generate different verification images. Simulation results are further demonstrated to verify the proposed method.
© 2002 Optical Society of America
[Optical Society of America ]
OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(100.3020) Image processing : Image reconstruction-restoration
(100.5070) Image processing : Phase retrieval
Citation
Chia H. Yeh, Hsuan T. Chang, Hung C. Chien, and Chung J. Kuo, "Design of Cascaded Phase Keys for a Hierarchical Security System," Appl. Opt. 41, 6128-6134 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-29-6128
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