A novel solar radio spectrogram encryption algorithm based on parameter variable chaotic systems and DNA dynamic encoding

Abstract

Considering that chaotic systems are highly sensitive to parameters, we design two new parameter variable chaotic systems by constructing parameter perturbation items. These systems are constructed using the state variables of the Liu chaotic system to perturb the parameters of the Lorenz and Chen chaotic systems and are called the Lorenz-Liu chaotic system (LLCS) and Chen-Liu chaotic system (CLCS), respectively. In particular, the parameter perturbation items constructed in this study are not periodic but rather chaotic signals and change in real time. Compared with the original systems, they exhibit more complex randomness and dynamic behaviors. In the proposed cryptosystem, which considers the concept of Deoxyribonucleic Acid (DNA), the solar radio spectrogram is dynamically encoded through the LLCS, and then, the CLCS is used to scramble and diffuse the decoding matrices. In addition, the algorithm uses the 256-bit Secure Hash Algorithm (SHA-256) to generate the initial keys, which enhances the algorithm’s sensitivity to plaintext. Simulation results and security analysis show that the cryptosystem has a large key space and high key sensitivity, and can resist various attacks, such as differential attacks and chosen-plaintext attacks.

Solar radio spectrogram segmentation algorithm based on improved fuzzy C-means clustering and adaptive cross filtering

“…Overview of the design for solar radio spectrum burst image segmentation Solar radio spectrograms describe the relationships between solar radio intensity, time, and frequency [46]. When the signal processing platform receives the solar radio signal from the observation system, the color depth of the spectrogram changes in real-time according to the signal intensity [46]. Therefore, whether a solar radio burst occurs can be determined based on the spectrogram's color depth [46].…”

“…When the signal processing platform receives the solar radio signal from the observation system, the color depth of the spectrogram changes in real-time according to the signal intensity [46]. Therefore, whether a solar radio burst occurs can be determined based on the spectrogram's color depth [46]. Figure 1 shows solar radio spectrograms drawn by the observation system at the Chashan Solar Radio Observatory of Shandong University.…”

A novel spectrogram visual security encryption algorithm based on block compressed sensing and five-dimensional chaotic system

“…Step3: In combination with the rules stipulated in formula (21), matrices R 9 , G 9 and B 9 are embedded into matrices R ′ , G ′ , B ′ and A ′ , respectively.…”

“…In 2015, after the visual security encryption technology with the dual advantages of image encryption and steganography was proposed, it immediately received the attention and research of many scholars [18][19][20]. In 2015, Zhou et al designed a practicable visual security encryption system combining nonlinear fractional Mellin transform with two-dimensional compressed sensing (2DCS) [21]. Firstly, the selected plain images are measured by the measurement matrix to realize compression and encryption, and then a nonlinear fractional Mellin transform is performed for secondary encryption.…”

On real and complex dynamical models with hidden attractors and their synchronization

“…where x, y, and z are state variables, a is constant parameter, and dots represent time derivatives. There exist many dynamical models in various fields [16][17][18][19][20][21][22][23]. Huang and Bae [16] presented the chaotic FO love model.…”