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symmetric algorithm for Detection of Coverage Hole in Wireless Sensor Network

WIRELESS PERSONAL COMMUNICATIONS 2022年第1期127卷 141-158页

作者： Wang, Feifei Hu, Haifeng Pingdingshan Univ Informat Engn Coll Pingdingshan 467000 Peoples R China

For the problems of traditional overburden hole detection methods, such as overtime, low accuracy and high running cost, etc. A multi factor reliable coverage hole detection method based on LEACH algorithm is proposed. Based on the analysis of the QoS architecture of wireless sensor networks and the research of representative network layer symmetry protocols, a symmetric network model is constructed according to the selection of gateway performance parameters, gateway selection criterion function and symmetry criterion, and a symmetric criterion design and optimization strategy is given. It uses this strategy to improve LEACH algorithm in three aspects. Two reliability optimization factors are added to the similarity calculation of coverage hole detection, which are node intrusion optimization factor and multipath transmission optimization factor respectively. Multipath transmission optimization factor is used in data transmission. In hostile environments, in order to avoid a large number of malicious nodes interfering with real data, the data containing noise should be filtered and processed. Then, the similarity is calculated by multi-path transmission optimization factor, and the coverage holes of wireless sensor networks are detected by weighted average. The experimental results show that the proposed method takes less time to detect the covering holes, which has higher detection accuracy and lower operation cost.

关键词： symmetric algorithm Wireless sensor network Coverage hole Detection

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Hip-hop action image recognition based on symmetric algorithm and iterative weighting of dense sampling

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JOURNAL OF AMBIENT INTELLIGENCE AND HUMANIZED COMPUTING 2020年 1-11页

作者： Han, Zhen Ma, Minhang Zhejiang Int Studies Univ Minist Phys Educ & Res Hangzhou Peoples R China

With the rapid increase of hip-hop video data, facing a large number of rapidly updated data, automatic, accurate and fast analysis and recognition of relevant information in hip-hop video has become an urgent problem to be solved. An image recognition method of hip-hop action based on symmetric algorithm and iterative weighting of dense sampling is proposed. Firstly, the symmetric action feature of human hip-hop action image is extracted by the feature extraction method based on symmetric algorithm. Then, the symmetric action feature is obtained by fusion of the hip-hop action recognition algorithm based on iterative weighting of dense sampling. Finally, the action feature is obtained based on the fused action feature. The K-nearest neighbor classification learning method is used to recognize the hip-hop action image. The experimental results show that, under the same sample number, the number of omissions of children is 3, the extraction rate is 92.5%;the number of omissions of adults is 0, the extraction rate is 100%. This method can extract the human hip-hop image well, which lays a good foundation for the subsequent image recognition.

关键词： symmetric algorithm Dense sampling Iterative weighting Hip-hop Action Image Recognition

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Minimum transmission delay algorithm for multi-hop nodes in Internet of Things based on symmetric algorithm

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JOURNAL OF AMBIENT INTELLIGENCE AND HUMANIZED COMPUTING 2020年 1-10页

作者： Hu, Chengbo Liu, Yang Tao, Fengbo Lu, Yongling Wang, Zhen State Grid Jiangsu Elect Power Co Ltd Res Inst Nanjing Peoples R China Southeast Univ Sch Elect Engn Nanjing Peoples R China State Grid Jiangsu Elect Power Co Ltd Dept Technol Nanjing Peoples R China

In view of the increase of network information transmission times, the transmission delay of multi hop nodes in the Internet of Things increases, resulting in the decline of network information transmission performance. In order to improve the quality and performance of information transmission, a minimum transmission delay algorithm of multi-hop nodes in the Internet of Things is designed based on symmetric algorithm. In the perception layer of the Internet of Things, based on the revocable symmetric encryption algorithm, the multi-hop nodes in the perception layer are encrypted;The link information transmission delay under the direct transmission, cooperative transmission and multi-hop transmission modes is compared, and the gradient projection algorithm is used to solve the problem of minimizing the delay of multi-hop nodes' information transmission in the Internet of Things. After calculating the projection matrix and the gradient, the iteration terminates when the steady link traffic and the delay value are obtained. The source node refers to the network node that acts as the source to send the original data packet;the source node uses this algorithm to select the transmission mode with minimum delay, and sends information to the destination node step by step. The simulation test shows that the algorithm can guarantee the security of data transmission of multi-hop nodes in the Internet of Things, and the transmission delay is the minimum.

关键词： symmetric algorithm Internet of Things Multi-hop nodes Gradient projection algorithm Transmission delay algorithm

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Automatic Encryption Method of Sensor Network Capture Data Based on symmetric algorithm

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WIRELESS PERSONAL COMMUNICATIONS 2022年第1期127卷 353-367页

作者： Li, Ming Mudanjiang Normal Univ Sch Comp & Informat Technol Mudanjiang 157011 Peoples R China

Due to overlapping coverage areas of nodes, traditional data encryption methods for sensor networks fail to consider the logical correlation between common nodes and transmission paths, resulting in low data capture efficiency, low data communication after encryption, and poor data sensitivity extraction effect. Therefore, this paper proposes an automatic encryption method for sensor network capture data based on symmetric algorithm. Based on the analysis of WSN architecture and sensor node structure, symmetric algorithm encryption flow is designed;The network attack model is established, and the multi-path transmission security is analyzed according to the symmetric algorithm, the probability of successful eavesdropping is calculated, and the sensor network capture data is encrypted accordingly. In order to verify the performance of network capture data encryption, a comparative experiment is designed. The results show that the data recall rate is as high as 99.0%, the data communication volume can reach 6.97 x 104byte, and the extraction accuracy of sensitive information can reach 97.9%. This method can effectively solve the problems existing in traditional methods and lay a foundation for the development of sensor network data encryption.

关键词： Node coverage symmetric algorithm Multipath transmission security Cyber attack model Data traffic

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Information Iterative Retrieval of Internet of Things Communication Terminal Based on symmetric algorithm

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WIRELESS PERSONAL COMMUNICATIONS 2021年第4期117卷 3469-3485页

作者： Zhao, Min Tianjin Univ Sci & Technol Sch Elect & Informat Engn Tianjin 300202 Peoples R China

Through improved similarity analysis algorithm and hybrid local sensitivity hashing method, information is summarized and retrieved by information retrieval method based on EPC network architecture. This method does not consider the symmetry of information, and its retrieval effect is poor, security is low, and resource occupancy rate is high. Therefore, the information iterative retrieval of IoT communication terminal based on symmetric algorithm is proposed to solve these problems. The symmetric private information retrieval protocol based on secret sharing is used to obtain the information set with retrieval, and the Paillier homomorphic information retrieval method is used to obtain the original document of the information communication terminal information. Then, the information detection model based on the iterative algorithm is used to obtain information of the IoT communication terminal. The experimental results show that the retrieval accuracy of the proposed method is higher than 96% when the document set is less than 1000 KB, and the retrieval accuracy is 94.47% when the document set is 10 TB. The CPU usage and memory usage of this method are 8.65 and 3.24%, respectively. Experiments show that the proposed method has extremely high retrieval accuracy and low energy consumption.

关键词： symmetric algorithm Internet of things Communication terminal Information Iterative retrieval Secret sharing Original document

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Discussion of one new symmetric algorithm

Discussion of one new symmetric algorithm

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International Multiconference of Engineers and Computer Scientists

作者： Chan, Xiaorui Liu, Guangzhong Shanghai Maritime Univ Coll Informat Engn Shanghai Peoples R China

ISBN: (纸本)9789889867140

We have devised one now kind of 160 bits symmetric encryption algorithms, basing on a kernel encryption function called S. By incising 160 bits data block into eight pieces, S function produces one brand-new 160 bits ciphertext after continuous Iteration, encryption, and combination. From computer results, we have found that: without increasing the time complexity, the new algorithm improves the security better comparing with DES and IDEA algorithms.

关键词： encryption algorithm symmetric algorithm time complexity

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Two Layer symmetric Cryptography algorithm for Protecting Data from Attacks

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Computers, Materials & Continua 2023年第2期74卷 2625-2640页

作者： Muhammad Nadeem Ali Arshad Saman Riaz Syeda Wajiha Zahra Shahab SBand Amir Mosavi Department of Computer Science Abasyn UniversityIslamabad44000Pakistan Department of Computer Science National University of TechnologyIslamabad44000Pakistan Future Technology Research Center National Yunlin University of Science and TechnologyDouliuYunlin64002Taiwan Institute of Information Society University of Public ServiceBudapest1083Hungary John Von Neumann Faculty of Informatics Obuda UniversityBudapestHungary Institute of Information Engineering Automation and MathilticsSlovak University of Technology in BratislavaSlovakia

Many organizations have insisted on protecting the cloud server from the outside,although the risks of attacking the cloud server are mostly from the *** are many algorithms designed to protect the cloud server from attacks that have been able to protect the cloud server ***,the attackers have designed even better mechanisms to break these security *** cryptography is the best data protection algorithm that exchanges data between authentic *** this article,one symmetric cryptography algorithm will be designed to secure cloud server data,used to send and receive cloud server data securely.A double encryption algorithm will be implemented to send data in a secure ***,the XOR function will be applied to plain text,and then salt technique will be ***,a reversing mechanism will be implemented on that data to provide more data *** decrypt data,the cipher text will be reversed,salt will be removed,andXORwill be *** the end of the paper,the proposed algorithm will be compared with other algorithms,and it will conclude how much better the existing algorithm is than other algorithms.

关键词： Cryptography symmetric algorithm encryption decryption cipher text cloud security asymmetric algorithm

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symmetric recursive algorithms for surfaces: B-patches and the de boor algorithm for polynomials over triangles

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Constructive Approximation 1991年第1期7卷 257-279页

作者： Seidel, Hans-Peter Wilhelm-Schickard-Institut für Informatik Universität Tübingen Tübingen D-7400 Auf der Morgenstelle 10 C9 Germany

Using the concept of a symmetric recursive algorithm, we construct a new patch representation for bivariate polynomials: the B-patch. B-patches share many properties with B-spline segments: they are characterized by their control points and by a three-parameter family of knots. If the knots in each family coincide, we obtain the Bézier representation of a bivariate polynomial over a triangle. Therefore B-patches are a generalization of Bézier patches. B-patches have a de Boor-like evaluation algorithm, and, as in the case of B-spline curves, the control points of a B-patch can be expressed by simply inserting a sequence of knots into the corresponding polar form. In particular, this implies linear independence of the blending functions. B-patches can be joined smoothly and they have an algorithm for knot insertion that is completely similar to Boehm's algorithm for curves. © 1991 Springer-Verlag New York Inc.

关键词： AMS classification: 41A15 B-patch B-spline Bézier patch Blossom Control point de Boor algorithm de Casteljau algorithm Knot insertion Knot net Polar form symmetric algorithm Triangular patch

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Regularized frictional contact problems with the interior point method

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JAPAN JOURNAL OF INDUSTRIAL AND APPLIED MATHEMATICS 2023年第2期40卷 775-807页

作者： Houssein, Houssam Garnotel, Simon Hecht, Frederic Sorbonne Univ Lab Jacques Louis Lions JLL L F-75005 Paris France Airthium SAS Accelair 1 Chemin Porte des Loges F-78350 Les Loges En Josas France

The aim of this paper is to present an algorithm to solve frictional contact problems by considering the Coulomb's criterion. As it is known, the frictional contact problem using Coulomb's criterion has no minimization principle behind. However in order to use algorithms based on minimization methods, the frictional contact problem is written as an optimization one, more specifically as a sequence of Tresca contact problems. Moreover a family of regularization functions is introduced in order to regularize the non-smooth character of the Tresca criterion, which in some cases can have an experimental justifications. As each minimization problem becomes smooth enough, the interior point method is used to solve the generated optimization problem, which has some advantages when the non-penetration constraints are imposed in a symmetrical manner.

关键词： Frictional contact regularization optimization interior point method symmetric algorithm

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DISPLAYING 3D IMAGES - algorithmS FOR SINGLE-IMAGE RANDOM-DOT STEREOGRAMS

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COMPUTER 1994年第10期27卷 38-&页

作者： THIMBLEBY, HT INGLIS, S WITTEN, IH UNIV WAIKATO DEPT COMP SCIHAMILTONNEW ZEALAND

Stereopsis, the fusing of two separate images, one for each eye, to produce the effect of depth is natural when viewing solid objects. The effect can also be produced with two-dimensional pictures if each eye receives a separate image corresponding to the view it would have of the actual 3D object. This article describes how to generate a single image that when viewed in the appropriate way on paper or on an ordinary computer screen appears to the brain as a 3D scene. The image is a stereogram composed of seemingly random dots. The authors present a new, simple, and symmetric algorithm for generating such images from a solid model, along with the design parameters and their influence on the display. The algorithm improves on previously described algorithms in several ways: It is symmetric and hence free from directional (right-to-left or left-to-right) bias, it corrects a slight distortion in the rendering of depth, it removes hidden parts of surfaces, and it eliminates a type of artifact known as an ''echo.'' Random-dot stereograms are typically difficult to view initially because viewers must alter their eyes' convergence. If a computer screen is used for output rather than paper, the problem can be ameliorated by shimmering, or time-multiplexing of pixel values. Example stereograms art included, with detailed instructions for viewing. The authors also describe a simple computational technique for determining what is present in a stereogram so that if viewing is difficult, a viewer can determine what to look for.

关键词： 3D images 3D monochromatic objects autostereograms computer graphics single-image random-dot stereograms solid objects stereo image processing symmetric algorithm three-dimensional displays visual perception

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