检索结果-南通市图书馆

A chaotic hierarchical encryption/watermark embedding scheme for multi-medical images based on row-column confusion and closed-loop bi-directional diffusion

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第2期33卷 228-237页

作者：张哲祎牟俊 santo.banerjee 曹颖鸿 School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China Department of Mathematical Sciences Politecnico di TorinoTorino 10129Italy

Security during remote transmission has been an important concern for researchers in recent *** this paper,a hierarchical encryption multi-image encryption scheme for people with different security levels is designed,and a multiimage encryption(MIE)algorithm with row and column confusion and closed-loop bi-directional diffusion is adopted in the *** ensuring secure communication of medical image information,people with different security levels have different levels of decryption keys,and differentiated visual effects can be obtained by using the strong sensitivity of chaotic *** highest security level can obtain decrypted images without watermarks,and at the same time,patient information and copyright attribution can be verified by obtaining watermark *** experimental results show that the scheme is sufficiently secure as an MIE scheme with visualized differences and the encryption and decryption efficiency is significantly improved compared to other works.

关键词： chaotic hierarchical encryption multi-medical image encryption differentiated visual effects row-column confusion closed-loop bi-directional diffusion transform domain watermark embedding

Superperiodicity,chaos and coexisting orbits of ion-acoustic waves in a four-component nonextensive plasma

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第11期72卷 87-98页

作者： Asit Saha Jharna Tamang Guo-Cheng Wu santo.banerjee Department of Mathematics Sikkim Manipal Institute of TechnologySikkim Manipal UniversityMajitarRangpoEast-Sikkim 737136India Data Recovery Key Laboratory of Sichuan Province College of Mathematics and Information ScienceNeijiang Normal UniversityNeijiang 641100China Department of Mathematical Sciences "Giuseppe Luigi Lagrange"Politecnico di TorinoCorso Duca degli Abruzzi 24TorinoItaly

Superperiodicity,chaos and coexisting orbits of ion-acoustic waves(IAWs)are studied in a multi-component plasma consisting of fluid ions,q-nonextensive cold and hot electrons and Maxwellian hot *** significant impacts of the system parameters on superperiodic and nonlinear periodic IAWs are *** an external periodic perturbation various types of quasiperiodic and chaotic features for IAWs are studied in different parametric ranges through time series’plots,phase spaces and Lyapunov *** has been observed that there exist some coexisting orbits for *** orbits for IAWs in a classical electron-positron-ion plasma system are reported.

关键词： dynamical system supernonlinear periodic wave quasiperiodicity multistability

Dynamical analysis,circuit realization,and application in pseudorandom number generators of a fractional-order laser chaotic system

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第12期30卷 254-263页

作者： Chenguang Ma santo.banerjee Li Xiong Tianming Liu Xintong Han Jun Mou School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China School of Physics and Electromechanical Engineering Hexi UniversityZhangye 734000China Department of Mathematical Sciences Giuseppe Luigi LagrangePolitecnico di TorinoCorso Duca degli Abruzzi 24TorinoItaly

A new five-dimensional fractional-order laser chaotic system(FOLCS)is constructed by incorporating complex variables and fractional calculus into a Lorentz-Haken-type laser *** behavior of the system,circuit realization and application in pseudorandom number generators are *** types of multi-stable states are discovered in the ***,there are two types of state transition phenomena in the system,one is the chaotic state degenerates to a periodical state,and the other is the intermittent chaotic *** addition,the complexity of the system when two parameters change simultaneously is measured by the spectral entropy ***,a digital circuit is design and the chaotic oscillation behaviors of the system are verified on this ***,a pseudo-random sequence generator is designed using the FOLCS,and the statistical characteristics of the generated pseudo-random sequence are tested with the *** study enriches the research on the dynamics and applications of FOLCS.

关键词： fractional-order laser chaotic system SE complexity intermittent chaos NIST test circuit realization

A color image encryption algorithm based on hyperchaotic map and DNA mutation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第3期32卷 131-142页

作者：高昕瑜孙博曹颖鸿 santo.banerjee 牟俊 School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China Department of Mathematical Sciences Giuseppe Luigi LagrangePolitecnico di TorinoCorso Duca degli Abruzzi 24TorinoItaly

We devise a color image encryption scheme via combining hyperchaotic map,cross-plane operation and gene ***,the hyperchaotic map used in the encryption scheme is analyzed and *** the basis of the dynamics of hyperchaotic map,a color image encryption scheme is *** the end of the encryption process,a DNA mutation operation is used to increase the encoding images’randomness and to improve the encryption algorithm’s ***,simulation experiments,performance analysis,and attack tests are performed to prove the effectiveness and security of the designed *** work provides the possibility of applying chaos theory and gene theory in image encryption.

关键词： color image encryption hyperchaotic map cross-plane permutation DNA mutation