中国物理B ›› 2005, Vol. 14 ›› Issue (10): 1996-2003.doi: 10.1088/1009-1963/14/10/013

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A new distribution scheme of decryption keys used in optical verification system with multiple-wavelength information

张岩1, 牛春晖2, 顾本源2   

  1. (1)Department of Physics,Capital Normal University, Beijing 100037, China; (2)Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2005-05-31 修回日期:2005-06-16 出版日期:2005-10-20 发布日期:2005-10-20

A new distribution scheme of decryption keys used in optical verification system with multiple-wavelength information

Niu Chun-Hui (牛春晖)a, Zhang Yan (张岩)b, Gu Ben-Yuan (顾本源)a   

  1. a Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Department of Physics,Capital Normal University, Beijing 100037, China
  • Received:2005-05-31 Revised:2005-06-16 Online:2005-10-20 Published:2005-10-20

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摘要： A new distribution scheme of decryption keys used in optical verification systems is proposed. The encryption procedure is digitally implemented with the use of an iteration algorithm in computer. Three target images corresponding to three wavelengths are encoded into three sets of phase-only masks (POMs) by a special distributing method. These three sets of POMs are assigned to three authorized users as the personal identification. A lensless optical system is used as the verification system. In the verification procedure, every two of the three authorized users can pass the verification procedure cooperatively, but only one user cannot do. Numerical simulation shows that the proposed distribution scheme of decryption keys not only can improve the security level of verification system, but also can bring convenience and flexibility for authorized users.

关键词: optical encryption technique, multiple-wavelength information, diffractive optical system

Abstract: A new distribution scheme of decryption keys used in optical verification systems is proposed. The encryption procedure is digitally implemented with the use of an iteration algorithm in computer. Three target images corresponding to three wavelengths are encoded into three sets of phase-only masks (POMs) by a special distributing method. These three sets of POMs are assigned to three authorized users as the personal identification. A lensless optical system is used as the verification system. In the verification procedure, every two of the three authorized users can pass the verification procedure cooperatively, but only one user cannot do. Numerical simulation shows that the proposed distribution scheme of decryption keys not only can improve the security level of verification system, but also can bring convenience and flexibility for authorized users.

Key words: optical encryption technique, multiple-wavelength information, diffractive optical system

中图分类号:  (Imaging and optical processing)

  • 42.30.-d
84.40.Ua (Telecommunications: signal transmission and processing; communication satellites)