Novel image encryption/decryption based on quantum Fourier transform and double phase encoding

  • Authors:

  • Yu-Guang Yang;Juan Xia;Xin Jia;Hua Zhang

  • Affiliations:

  • College of Computer Science and Technology, Beijing University of Technology, Beijing, China 100124;College of Computer Science and Technology, Beijing University of Technology, Beijing, China 100124;College of Computer Science and Technology, Beijing University of Technology, Beijing, China 100124;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China 100876

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2013

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Abstract

A novel gray-level image encryption/decryption scheme is proposed, which is based on quantum Fourier transform and double random-phase encoding technique. The biggest contribution of our work lies in that it is the first time that the double random-phase encoding technique is generalized to quantum scenarios. As the encryption keys, two phase coding operations are applied in the quantum image spatial domain and the Fourier transform domain respectively. Only applying the correct keys, the original image can be retrieved successfully. Because all operations in quantum computation must be invertible, decryption is the inverse of the encryption process. A detailed theoretical analysis is given to clarify its robustness, computational complexity and advantages over its classical counterparts. It paves the way for introducing more optical information processing techniques into quantum scenarios.