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Opt Express. 2010 Apr 12;18(8):7827-34. doi: 10.1364/OE.18.007827.

An encryption method with multiple encrypted keys based on interference principle.

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Photoelectric School, Beijing Information Science&Technology University, Beijing, 100092,China.


An encryption and verification method with multiple encrypted keys based on interference principle is proposed. The encryption process is realized on computer digitally and the verification process can be completed optically or digitally. Two different images are encoded into three diffractive phase elements (DPEs) by using two different incident wavelengths. Three DPEs have different distances from output plane. The two wavelength parameters and three distance parameters can be used as encryption keys, which will boost security degree of this system. Numerical simulation proves that the proposed encryption method is valid and has high secrecy level.

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