检索结果-内蒙古大学图书馆

An efficient dual-layer cross-coupled chaotic map security-based multi-image encryption system

NONLINEAR DYNAMICS 2021年第3期104卷 2759-2805页

作者： Patro, K. Abhimanyu Kumar Acharya, Bibhudendra Natl Inst Technol Raipur Dept Elect & Commun Engn Raipur 492010 Chhattisgarh India

This paper proposes an effective image encryption method to encrypt several images in one encryption process. The proposed encryption scheme differs from the current multiple image encryption schemes because of their two-layer cross-coupled chaotic map-based permutation-diffusion operation. Block-shuffling, left-right (L-R) flipping and then bit-XOR diffusion operations are carried out in the first layer using one set of cross-coupled chaotic map. Block-shuffling, up-down (U-D) flipping and then bit-XOR diffusion operations are performed with another set of cross-coupled chaotic maps in the second layer. The two different layers of permutation-diffusion make the proposed algorithm more efficient than the existing multi-image encryption algorithms. Moreover, the combination of block-based shuffling and flip operation decreases the algorithm's computational complexity, which means enhancing the time efficiency of the algorithm. In cross-coupling operation, the use of a single fixed-type one-dimensional chaotic map-piece-wise linear chaotic map (PWLCM) makes the algorithm efficient both in hardware and in software. PWLCM's initial values and system parameters (keys) are generated by means of the hash values of original images that resist the algorithm against the attacks of chosen-plaintext and known-plaintext. Results of simulation and comparative security analysis reveal that the suggested scheme is more effective in encryption and resists better against all widely used attacks.

关键词： Security Multi-image encryption Cross-coupling Data hiding Chaos hash algorithm

来源：评论

学校读者我要写书评

暂无评论

Vitality evaluation of the waterfront space in the ancient city of Suzhou

引用

Frontiers of Architectural Research 2021年第4期10卷 729-740页

作者： Yingxiang Niu Xiaoyan Mi Zhao Wang School of Architecture Tianjin UniversityTianjin300072China School of Information Technology and Electrical Engineering The University of QueenslandBrisbaneQld4072Australia

With a history spanning thousands of years,the water system of Suzhou is an indispensable carrier of urban space and civil *** model analysis of the waterfront in the ancient city of Suzhou has significant implications for the future design of waterfront space and the establishment of an evaluation method to determine the vitality of such *** this study,a vitality evaluation model was first constructed using river attributes,the spatial type of waterfront areas,vision accessibility,transportation accessibility,and combined new data extracted using spatial factor ***,a vitality evaluation matrix was established using the analytic hierarchy process to simulate the vitality of waterfront ***,a hash algorithm was employed to determine the fitting degree between the vitality model of Suzhou’s waterfront space and crowd *** different areas between them were found and then the factor evaluation process was adjusted on this basis of analyzing the ***,this study identified the factors influencing the vitality of Suzhou’s ***,this research constructed a model for evaluating the vitality of waterfront ***,some guidelines were presented regarding the design and implementation of waterfront spaces in urban design.

关键词： Waterfront space Influence factor Vitality evaluation model Crowd activity hash algorithm

来源：评论

学校读者我要写书评

暂无评论

Implementation of TRNG with SHA-3 for hardware security

引用

MICROELECTRONICS JOURNAL 2022年 123卷 105410-105410页

作者： Kamadi, Annapurna Abbas, Zia Int Inst Informat Technol IIIT CVEST Hyderabad India

Random Number Generators (RNGs) are the solution for cryptographic applications to enhance hardware security. These RNGs ought to have three specific properties unpredictability, aperiodic, and good statistical criteria. This brief presents a True Random Number Generator (TRNG) based on Ring oscillators' jitter with MLFSR. The MLFSR is augmented with a set of prime primitive polynomials, Boolean, and non-linear functions to attain a non-linear, unpredictable, and extended sequence period. Paper mainly focused on achieving high randomness by integrated the TRNG with a new promising crypto engine Keccak as a post-processing block;leads to extensively more security in data transfer, encryption keys, data authenticity of ICs, and IoT based applications. The RNG design is coded in Verilog HDL and implemented on the FPGA Zed board. hashing is performed with a throughput of 2.4Gbps at 100 MHz either with RNG data or SHA data. Evaluated the randomness of the generated non-deterministic bitstreams (10 Mb) using the NIST 800-22 & Diehard test suite and successfully passed.

关键词： RNG TRNG PRNG HRNG MLFSR Sponge function hash algorithm Keccak Cryptography ILA FPGA Zed board NIST Diehard

来源：评论

学校读者我要写书评

暂无评论

An improved smart key frame extraction algorithm for vehicle target recognition

引用

COMPUTERS & ELECTRICAL ENGINEERING 2022年 97卷 107540-107540页

作者： Wang, Jianguo Zeng, Cheng Wang, Zhongsheng Jiang, Kun Xian Technol Univ Sch Comp Sci & Engn Xian Shaanxi Peoples R China Novel Network & Detect Control Engn Lab Natl & Lo Xian Peoples R China

The smart extraction of key frames is one of the critical technologies for vehicle target recognition in the video streaming environment. Currently, the common algorithms are scale-invariant feature transform (SIFT) or background-difference method. Both algorithms have their own advantages and shortcomings. In this paper, a smart key frame extraction algorithm is proposed by combining the background difference method and SIFT feature matching algorithm, at the same time, the criterion factor K is introduced. The algorithm absorbs the idea of background difference and SIFT feature matching, and divides video frames into mutation frames and non-mutation frames. hash algorithm is used to distinguish the similarity of two frames and remove redundant frames. The local feature of video sequence is introduced to solve the problem of sharp increasing calculation for inter frame distance. Experimental results show that the improved smart key frame extraction algorithm has a lower missing frame rate and higher accuracy for vehicle target recognition.

关键词： Video streaming Vehicle recognition Key frame hash algorithm Scale-invariant feature transform Background-difference method

来源：评论

学校读者我要写书评

暂无评论

Optimized data storage algorithm of IoT based on cloud computing in distributed system

引用

COMPUTER COMMUNICATIONS 2020年 157卷 124-131页

作者： Wang, Mingzhe Zhang, Qiuliang China Acad Railway Sci Beijing 100081 Peoples R China

The existing Internet of Things(IoT) uses cloud computing data access storage algorithms, that is, the hash algorithm has defects of low data processing efficiency and low fault tolerance rate. Therefore, HDFS is introduced to optimize cloud computing data access storage algorithms. HDFS is first used to optimize the data access storage architecture according to problems of data access storage architecture in the Internet of Things, in which factors of data access storage distribution in the IoT are fully considered, and hash values are used to optimize the configuration of data access information storage locations, so that data access storage distribution strategy can be optimized. Then, the topology of the IoT is optimized, and data block size is also optimized with effect algorithm. Finally, the design of file storage is optimized. Through simulation experiments, it is proved that the optimized cloud storage method has obvious performance advantages in file read and write speed as well as memory usage. Compared with the traditional hash algorithm, optimization algorithm proposed in the paper greatly improves file upload and download efficiency, data processing efficiency and fault tolerance rate, which fully demonstrates that the proposed cloud computing data access storage optimization algorithm is more superior.

关键词： Cloud computing Data access Storage hash algorithm Network topology

来源：评论

学校读者我要写书评

暂无评论

Secure, Lossless, and Noise-resistive Image Encryption using Chaos, Hyper-chaos, and DNA Sequence Operation

引用

IETE TECHNICAL REVIEW 2020年第3期37卷 223-245页

作者： Patro, K. Abhimanyu Kumar Acharya, Bibhudendra Nath, Vijay Natl Inst Technol Raipur Elect & Telecommun Engn Dept Raipur Chhattisgarh India Birla Inst Technol Mesra Elect & Commun Engn Dept Ranchi Bihar India

This paper proposes an image encryption scheme using the combination of chaos, hyper-chaos, and DNA sequence operation. The proposed scheme performs three stages of encryption operations. Those are selection-level hyper-chaotic sequence based DNA-shuffling operation, key-image based DNA-diffusion operation, and hyper-chaotic sequence based DNA-shuffling operation. The advantages of this scheme are higher key space, higher confusion or randomness of pixels, higher sensitivity to the keys and plaintext pixels, stronger resistivity to the noises, and lossless encryption and decryption. Moreover, selection-level hyper-chaotic sequence based DNA-shuffling operation generates more complexities in the confusion process which increases the strength of encryptions and decryptions. The computer simulation and security analyses confirm the good encryption results of the proposed scheme and strong resistivity to the commonly used attacks.

关键词： Chaos Confusion DNA sequence operation hash algorithm Hyper-chaos Image encryption Key space Lossless output Noise-resistance Security

来源：评论

学校读者我要写书评

暂无评论

A Robust Watermarking Scheme Based on ROI and IWT for Remote Consultation of COVID-19

引用

Computers, Materials & Continua 2020年第9期64卷 1435-1452页

作者： Xiaorui Zhang Wenfang Zhang Wei Sun Tong Xu Sunil Kumar Jha Jiangsu Engineering Center of Network Monitoring Engineering Research Center of Digital ForensicsMinistry of EducationSchool of Computer and SoftwareNanjing University of Information Science&TechnologyNanjing210044China Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science&TechnologyNanjing210044China IT Fundamentals and Education Technologies Applications University of Information Technology and Management in RzeszowRzeszow100031Poland

In the current dire situation of the corona virus COVID-19,remote consultations were proposed to avoid cross-infection and regional differences in medical ***,the safety of digital medical imaging in remote consultations has also attracted more and more attention from the medical *** ensure the integrity and security of medical images,this paper proposes a robust watermarking algorithm to authenticate and recover from the distorted medical images based on regions of interest(ROI)and integer wavelet transform(IWT).First,the medical image is divided into two different parts,regions of interest and non-interest *** the integrity of ROI is verified using the hash algorithm,and the recovery data of the ROI region is calculated at the same ***,binary images with the basic information of patients are processed by logistic chaotic map encryption,and then the synthetic watermark is embedded in the medical carrier image using IWT *** performance of the proposed algorithm is tested by the simulation experiments based on the MATLAB program in CT images of the *** results show that the algorithm can precisely locate the distorted areas of an image and recover the original ROI on the basis of verifying image *** maximum peak signal to noise ratio(PSNR)value of 51.24 has been achieved,which proves that the watermark is invisible and has strong robustness against noise,compression,and filtering attacks.

关键词： Digital watermarking logistic hash algorithm ROI IWT

来源：评论

学校读者我要写书评

暂无评论

Dynamical analysis and image encryption application of a novel memristive hyperchaotic system

引用

OPTICS AND LASER TECHNOLOGY 2021年 133卷 106553-106553页

作者： Yang, Yang Wang, Lidan Duan, Shukai Luo, Li Southwest Univ Coll Elect & Informat Engn Chongqing 400715 Peoples R China Southwest Univ Coll Artificial Intelligence Chongqing 400715 Peoples R China Brain Inspired Comp & Intelligent Control Chongqi Chongqing 400715 Peoples R China Natl & Local Joint Engn Lab Intelligent Transmiss Chongqing 400715 Peoples R China Chongqing Brain Sci Collaborat Innovat Ctr Chongqing 400715 Peoples R China

In this paper, a new four-dimensional memristive hyperchaotic system is constructed based on Liu chaotic system by introducing a flux-controlled memristor model. Then the dynamic characteristics of the new system such as phase portraits, dissipation, Lyapunov exponent and power spectrum are investigated. Subsequently, a novel image encryption algorithm is designed based on the chaotic sequence generated by the proposed hyperchaotic system combining the hash algorithm and DNA sequence operations. In this image encryption algorithm, the coupling relationship between plaintext and ciphertext is established by using the hash value of plaintext image obtained by hash algorithm, and then the plaintext is decomposed into eight bit-plane, to improve the efficiency of the algorithm, only the higher four bit-plane are selected for scrambling. After scrambling, the data stream is further processed by the DNA encoding/decoding rules and DNA sequence operations to obtain the intermediate ciphertext. Finally, the ultimate encrypted image is obtained by performing order and reverse-order diffusion operations at the pixel level on the intermediate ciphertext. Experimental results and security analysis show that the proposed algorithm has excellent image encryption performance and can resist a variety of common attacks against the image encryption system.

关键词： Memristor Hyperchaotic system Image encryption hash algorithm Deoxyribonucleic acid (DNA)

来源：评论

学校读者我要写书评

暂无评论

High Throughput Pipelined Implementation of the SHA-3 Cryptoprocessor 32

High Throughput Pipelined Implementation of the SHA-3 Crypto...

引用

32nd International Conference on Microelectronics (ICM)

作者： Sideris, Argyrios Sanida, Theodora Dasygenis, Minas Univ Western Macedonia Dept Elect & Comp Engn Kozani 50131 Greece

ISBN: (纸本)9781728196640

Today, in the modern world of digital communications, sensitive information is transmitted via public networks. It is essential to ensure the privacy of their transmission with confidentiality, security and integrity using techniques like hashing. An optimized and high throughput implementation of Secure hash algorithm-3 (SHA-3) in hardware is a vital issue for the efficient operation of many modern and demanding systems that utilize this operation in high bandwidth links. In this paper, we propose a pipelined architecture of the SHA-3 256 algorithm in order to increase the hash function calculation speed in Field Programmable Gate Array (FPGA). The proposed architecture is able to function in both single block and multi block messages. Our design is designed and verified in the Very High Speed Integrated Circuit Hardware Description language (VHDL) and synthesized in the FPGA Arria 10 GX. The results show that a significant improvement in throughput, frequency and efficiency is achieved compared to the published literature.

关键词： SHA-3 Pipelining Cryptography Cryptographic hash function hash algorithm Sponge function Hardware Implementation Keccak hash function FPGA

来源：评论

学校读者我要写书评

暂无评论

Depersonalization of Personal Data in Information Systems

Depersonalization of Personal Data in Information Systems

引用

International Russian Automation Conference (RusAutoCon)

作者： Primenko, D., V Spevakov, A. G. Spevakova, S., V Southwest State Univ 94 Pyatdesyat Let Oktyabrya St Kursk 305040 Russia

ISBN: (纸本)9783030392253;9783030392246

The analysis of the methods of anonymization of personal data processed by automated information systems was carried out, their shortcomings were revealed. To eliminate the shortcomings, a method of anonymization of personal data has been developed, based on the method of introducing identifiers using hashing of critical data and the key of the institution. This method has the following advantages: the data becomes impersonal, what allows reducing the cost of personal data information systems protection;the impossibility of determining a specific subject in personal data information systems based on known unique attributes of the subject;the operator, when the subject refers to his personal data, gets access only to one record of the personal data information system. The use of this method is considered using the famous characters of Alice and Bob. The conducted experiments have confirmed the proposed software operability and allow recommending it for use in practice for solving the problems of diagnosis and automatic classification on the features. The prospects for further research may include the creation of parallel methods for calculation of set of proposed indicators, the optimization of their software implementations, as well as a experimental study of proposed indicators on more complex practical problems of different nature and dimensionality.

关键词： Depersonalization Personal data hash identifier hash algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：