21 June 2017 All-in-one visual and computer decoding of multiple secrets: translated-flip VC with polynomial-style sharing
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Abstract
This all-in-one hiding method creates two transparencies that have several decoding options: visual decoding with or without translation flipping and computer decoding. In visual decoding, two less-important (or fake) binary secret images S 1 and S 2 can be revealed. S 1 is viewed by the direct stacking of two transparencies. S 2 is viewed by flipping one transparency and translating the other to a specified coordinate before stacking. Finally, important/true secret files can be decrypted by a computer using the information extracted from transparencies. The encoding process to hide this information includes the translated-flip visual cryptography, block types, the ways to use polynomial-style sharing, and linear congruential generator. If a thief obtained both transparencies, which are stored in distinct places, he still needs to find the values of keys used in computer decoding to break through after viewing S 1 and/or S 2 by stacking. However, the thief might just try every other kind of stacking and finally quit finding more secrets; for computer decoding is totally different from stacking decoding. Unlike traditional image hiding that uses images as host media, our method hides fine gray-level images in binary transparencies. Thus, our host media are transparencies. Comparisons and analysis are provided.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Chia-Hua Wu, Chia-Hua Wu, Suiang-Shyan Lee, Suiang-Shyan Lee, Ja-Chen Lin, Ja-Chen Lin, } "All-in-one visual and computer decoding of multiple secrets: translated-flip VC with polynomial-style sharing," Optical Engineering 56(6), 063106 (21 June 2017). https://doi.org/10.1117/1.OE.56.6.063106 . Submission: Received: 11 January 2017; Accepted: 1 June 2017
Received: 11 January 2017; Accepted: 1 June 2017; Published: 21 June 2017
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