Phase-Image Encryption Based on 3D-Lorenz Chaotic System and Double Random Phase Encoding
| Autor: | Indu Saini, Ak Yadav, Phool Singh, Neha Sharma |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Theoretical computer science
business.industry Chaotic 02 engineering and technology Lorenz system Encryption 01 natural sciences Grayscale 010309 optics Deterministic encryption Watermarking attack 020210 optoelectronics & photonics Frequency domain Computer Science::Multimedia 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Noise (video) Electrical and Electronic Engineering business Algorithm Software Computer Science::Cryptography and Security Mathematics |
| Zdroj: | 3D Research. 8 |
| ISSN: | 2092-6731 |
| Popis: | In this paper, an encryption scheme for phase-images based on 3D-Lorenz chaotic system in Fourier domain under the 4f optical system is presented. The encryption scheme uses a random amplitude mask in the spatial domain and a random phase mask in the frequency domain. Its inputs are phase-images, which are relatively more secure as compared to the intensity images because of non-linearity. The proposed scheme further derives its strength from the use of 3D-Lorenz transform in the frequency domain. Although the experimental setup for optical realization of the proposed scheme has been provided, the results presented here are based on simulations on MATLAB. It has been validated for grayscale images, and is found to be sensitive to the encryption parameters of the Lorenz system. The attacks analysis shows that the key-space is large enough to resist brute-force attack, and the scheme is also resistant to the noise and occlusion attacks. Statistical analysis and the analysis based on correlation distribution of adjacent pixels have been performed to test the efficacy of the encryption scheme. The results have indicated that the proposed encryption scheme possesses a high level of security. |
| Databáze: | OpenAIRE |
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