期刊
OPTICS COMMUNICATIONS
卷 388, 期 -, 页码 38-46出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2016.11.002
关键词
Image encryption; Double random phase encoding; Fractional Fourier transform; Phase retrieval algorithm; Phase truncation
类别
资金
- Council of Scientific and Industrial Research (CSIR), Government of India [03/(1351)/16/EMR-II]
- Science and Engineering Research Board (SERB), Government of India [SB/OS/PDF-117/2015-16]
We propose a novel security scheme based on the double random phase fractional domain encoding (DRPE) and modified Gerchberg-Saxton (G-S) phase retrieval algorithm for securing two images simultaneously. Any one of the images to be encrypted is converted into a phase-only image using modified G-S algorithm and this function is used as a key for encrypting another image. The original images are retrieved employing the concept of known-plaintext attack and following the DRPE decryption steps with all correct keys. The proposed scheme is also used for encryption of two color images with the help of convolution theorem and phase-truncated fractional Fourier transform. With some modification, the scheme is extended for simultaneous encryption of gray-scale and color images. As a proof-of-concept, simulation results have been presented for securing two gray-scale images, two color images, and simultaneous gray-scale and color images.
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