Enhancing Security of Double Random Phase Encryption Schemes Based on Discrete Fractional Fourier Transforms

Existing double random phase encryption (DRPE) schemes in the DFT, discrete fractional Fourier transform (DFRFT), and multiple-parameter DFRFT domains are all linear and vulnerable to the known-plaintext attack. In this brief, we first propose a random nonlinearizing block, which is then added to an...

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Bibliographic Details
Main Author: Hsue, Wen-Liang
Format: Conference Proceeding
Language:English
Subjects:
Computer security
decryption
DFT
Discrete Fourier transforms
discrete fractional Fourier transform
Electrical engineering
Encryption
Resists
security
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Summary:Existing double random phase encryption (DRPE) schemes in the DFT, discrete fractional Fourier transform (DFRFT), and multiple-parameter DFRFT domains are all linear and vulnerable to the known-plaintext attack. In this brief, we first propose a random nonlinearizing block, which is then added to and nonlinearizes the encryption process of the conventional linear DRPE scheme. Besides, from computer experiments, we show the resulting random nonlinearized DRPE schemes are very sensitive to decryption key errors. Consequently, the proposed random nonlinearized DRPE schemes can resist the known-plaintext attack with enhanced security.
ISSN:2158-1525
2158-1525
DOI:10.1109/ISCAS45731.2020.9180524