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8th International Workshop on science Gateways, IWSG 2016

作者： Pierantoni, G. Frost, D. Gesing, S. Olabarriaga, S. Jaghoori, M. Terstyanszky, G. Arshaid, J. Trinity Center for High Performance Computing Trinity College Dublin Dublin Ireland Center for Research Computing Department of Computer Science and Engineering University of Notre Dame IN United States Academic Medical Center University of Amsterdam Netherlands Center for Parallel Computing University of Westminster London United Kingdom

To support scientists of different disciplines, different fields of computer science have developed tools and infrastructures with the aim of giving them access to vast computational resources in the easiest possible way. Such extremely complex structures have evolved naturally in the last decades both in depth and breath and, in addition to scientists, a plethora of heterogeneous actors (system administrators, developers, etc.) cooperate and interact with them. This complex and unstructured flow of actions and information poses difficulties in the development and usage of science Gateways because information can be missing or hard to isolate at the right layer. In this paper, we aim to start a discussion on how to best manage these information flows to help the design and implementation of more flexible and userfriendly science Gateways and workflow management systems in the future.

关键词： Interoperability

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performance evaluation of a hybrid wireless network architecture for rural communication

Performance evaluation of a hybrid wireless network architec...

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IEEE International Conference on Personal Wireless Communication

作者： K. Balaji N. Hegde B.V. Ramana B.S. Manoj C.S.R. Murthy High Performance Computing and Networking Laboratory Department of Computer Science and Engineering IIT-Madras India

In this paper, we evaluate the performance of Meghadoot - a packet based wireless mesh network architecture for low cost rural community networks. Meghadoot is designed for rural community networks as an alternative for the single-hop last mile. We have built a prototype network for the Meghadoot architecture and studied the impact of multi-hop relaying and constrained devices on end-to-end throughput. The experimental results show that in certain situations multi-hop last mile improves performance in addition to the enhanced coverage and also the presence of constrained nodes brings down the performance drastically.

关键词： Wireless networks Costs Educational institutions computer architecture Wireless mesh networks Relays Bandwidth Wireless LAN high performance computing laboratories

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Elliptic curve cryptography engineering

Elliptic curve cryptography engineering

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作者： Cilardo, Alessandro Coppolino, Luigi Mazzocca, Nicola Romano, Luigi Computer Science Department University Federico II Naples 80125 Italy High-Performance and Reliable Computing Computer and System Engineering Department University of Naples Federico II Italy Department for Technologies University of Naples Parthenope International Program Committees

In recent years, elliptic curve cryptography (ECC) has gained widespread exposure and acceptance, and has already been included in many security standards. engineering of ECC is a complex, interdisciplinary research field encompassing such fields as mathematics, computer science, and electrical engineering. In this paper, we survey ECC implementation issues as a prominent case study for the relatively new discipline of cryptographic engineering. In particular, we show that the requirements of efficiency and security considered at the implementation stage affect not only mere low-level, technological aspects but also, significantly, higher level choices, ranging from finite field arithmetic up to curve mathematics and protocols. © 2006 IEEE.

关键词： Cryptography

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Root-Of-Trust for Continuous Integration and Continuous Deployment Pipeline in Cloud computing

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computers, Materials & Continua 2022年第11期73卷 2223-2239页

作者： Abdul Saboor Mohd Fadzil Hassan Rehan Akbar Erwin Susanto Syed Nasir Mehmood Shah Muhammad Aadil Siddiqui Saeed Ahmed Magsi High-Performance Cloud Computing Centre(HPC3) Department of Computer&Information SciencesUniversiti Teknologi PETRONASSeri IskandarPerakMalaysia Centre for Research in Data Science(CeRDaS) Department of Computer&Information SciencesUniversiti Teknologi PETRONASSeri IskandarPerakMalaysia School of Electrical Engineering Telkom UniversityBandungIndonesia KICSIT Institute of Space Technology(IST)IslamabadPakistan Department of Electrical and Electronics Engineering Universiti Teknologi PETRONASSeri IskandarPerakMalaysia

Cloud computing has gained significant use over the last decade due to its several benefits,including cost savings associated with setup,deployments,delivery,physical resource sharing across virtual machines,and availability of on-demand cloud ***,in addition to usual threats in almost every computing environment,cloud computing has also introduced a set of new threats as consumers share physical resources due to the physical co-location ***,since there are a growing number of attacks directed at cloud environments(including dictionary attacks,replay code attacks,denial of service attacks,rootkit attacks,code injection attacks,etc.),customers require additional assurances before adopting cloud ***,the continuous integration and continuous deployment of the code fragments have made cloud services more prone to security *** this study,the model based on the root of trust for continuous integration and continuous deployment is proposed,instead of only relying on a single signon authentication method that typically uses only id and *** underlying study opted hardware security module by utilizing the Trusted Platform Module(TPM),which is commonly available as a cryptoprocessor on the motherboards of the personal computers and data center *** preliminary proof of concept demonstrated that the TPM features can be utilized through RESTful services to establish the root of trust for continuous integration and continuous deployment pipeline and can additionally be integrated as a secure microservice feature in the cloud computing environment.

关键词： Root of Trust(RoT) Trusted Platform Module(TPM) cryptoprocessor microservices Hardware Security Modules(HSM) DevOps

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Building dependable distributed applications using AQUA 4

Building dependable distributed applications using AQUA

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4th IEEE International Symposium on high-Assurance Systems engineering, HASE 1999

作者： Ren, Jennifer Cukier, Michel Rubel, Paul Sanders, William H. Bakken, David E. Karr, David A. Center for Reliable and High-Performance Computing Coordinated Science Laboratory Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL61801 United States BBN Technologies CambridgeMA02138 United States

ISBN: (纸本)0769504183

Building dependable distributed systems using ad hoc methods is a challenging task. Without proper support, an application programmer must face the daunting requirement of having to provide fault tolerance at the application level, in addition to dealing with the complexities of the distributed application itself. This approach requires a deep knowledge of fault tolerance on the part of the application designer, and has a high implementation cost. What is needed is a systematic approach to providing dependability to distributed applications. Proteus, part of the AQuA architecture, fills this need and provides facilities to make a standard distributed CORBA application dependable, with minimal changes to an application. Furthermore, it permits applications to specify, either directly or via the Quality Objects (QuO) infrastructure, the level of dependability they expect of a remote object, and will attempt to configure the system to achieve the requested dependability level. Our previous papers have focused on the architecture and implementation of Proteus. This paper describes how to construct dependable applications using the AQuA architecture, by describing the interface that a programmer is presented with and the graphical monitoring facilities that it provides. © 2017 IEEE.

关键词： Fault tolerance

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Proteus: A flexible infrastructure to implement adaptive fault tolerance in AQuA 7

Proteus: A flexible infrastructure to implement adaptive fau...

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7th IFIP International Working Conference on Dependable computing for Critical Applications, DCCA 1999

作者： Sabnis, Chetan Cukier, Michel Ren, Jennifer Rubel, Paul Sanders, William H. Bakken, David E. Karr, David A. Center for Reliable and High-Performance Computing Coordinated Science Laboratory Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign UrbanaIL61801 United States BBN Technologies CambridgeMA02138 United States

ISBN: (纸本)0769502849

Building dependable distributed systems from commercial off-the-shelf components is of growing practical importance. For both cost and production reasons, there is interest in approaches and architectures that facilitate building such systems. The AQuA architecture is one such approach;its goal is to provide adaptive fault tolerance to CORBA applications by replicating objects, providing a high-level method for applications to specify their desired dependability, and providing a dependability manager that attempts to reconfigure a system at runtime so that dependability requests are satisfied. This paper describes how dependability is provided in AQuA. In particular it describes Proteus, the part of AQuA that dynamically manages replicated distributed objects to make them dependable. Given a dependability request, Proteus chooses a fault tolerance approach and reconfigures the system to try to meet the request. The infrastructure of Proteus is described in this paper, along with its use in implementing active replication and a simple dependability policy. © 1999 IEEE.

关键词： Fault tolerance

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Hybrid FDTD-MPIE method for the simulation of locally inhomogeneous multilayer LTCC structure 5

Hybrid FDTD-MPIE method for the simulation of locally inhomo...

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5th Electronics Packaging Technology Conference, EPTC 2003

作者： Liu, En-Xiao Li, Er-Ping Li, Le-Wei Institute of High Performance Computing 1 Science Park Road #01-01 The Capricorn Singapore117528 Singapore National University of Singapore Department of Electrical and Computer Engineering 10 Kent Ridge Cresent Singapore119260 Singapore

ISBN: (纸本)0780382056

A new hybrid finite-difference time-domain-mixed potential integral equation method (FDTD-MPIE) is proposed for modeling and simulating multilayer planar problems with possible locally inhomogeneous geometries. By using equivalent principle, the original problem can be divided into different regions. The fields in the inhomogeneous regions are modeled by using FDTD method, which is a time domain method providing broad band fields information. The resultant interaction matrix from FDTD can be used as a look-up table for subsequent model coupling procedure. The fields in the layered structure with possible perfect electric conductors are described in terms of the equivalent electric and magnetic surface current densities by a mixed potential electric-field integral representation with less singular kernals. The interactions between the FDTD model and MPIE model are coupled together by enforcing the continuity of the tangential electric and magnetic fields at the equivalent surface using a Galerkin testing procedure. Numerical results of a canonical test problem are presented to validate the hybrid FDTD-MPIE method. © 2003 IEEE.

关键词： Electric fields

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Green wave-based virtual traffic light management scheme with VANETs

Green wave-based virtual traffic light management scheme wit...

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作者： Chou, Li-Der Shen, Tsung-Yi Tseng, Chia-Wei Chang, Yao-Jen Kuo, Yen-Wei Department of Computer Science and Information Engineering National Central University Taoyuan32001 Taiwan National Center for High-performance Computing National Applied Research Laboratories Hsinchu30076 Taiwan Department of Electronic Engineering Chung Yuan Christian University Taoyuan32023 Taiwan

Green intelligent transportation systems (GITS) have received significant attention in recent years. Traffic congestion, which is an important research topic on intelligent transportation systems (ITS), is rapidly becoming one of the most serious problems affecting urban areas. This study utilises the vehicular ad hoc networks (VANETs) technology to build a virtual traffic light (VTL) environment to reduce traffic congestion. The objective of this study is to adjust the traffic light signal time length on-demand to enable vehicles to pass through numerous intersections rapidly, thereby saving energy and reducing fuel consumption. The traffic phase combination algorithm and VTL operation mechanism are also addressed to improve the traffic congestion situation in urban areas. Simulation results indicate that the proposed scheme can increase the percentage of traffic flow and the average speed of all vehicles in all intersections, thereby saving energy. Copyright © 2017 Inderscience Enterprises Ltd.

关键词： Vehicular ad hoc networks

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A Progressive Secret Image Sharing Scheme Based on GEMD Data Hiding 3rd

A Progressive Secret Image Sharing Scheme Based on GEMD Data...

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3rd International Conference on Security with Intelligent computing and Big-data Services, SICBS 2019

作者： Kuo, Wen-Chung Chen, Yi-Jiun Wang, Chun-Cheng Huang, Yu-Chih Department of Computer Science and Information Engineering National Yunlin University of Science and Technology Yunlin Taiwan National Center for High-Performance Computing National Applied Research Laboratories Tainan744 Taiwan Department of Information Management Tainan University of Technology Tainan71002 Taiwan

ISBN: (纸本)9783030468279

With the development of the Internet, people spread digital information through the Internet. However, the Internet is a public channel. Avoiding digital information be tampered with to keep the security of data is the most important thing today. The main method of data hiding is to embed secret information into multimedia and then transmit it to the recipient. The stego multimedia would not attract someone and is protected from tampering during transmission. In addition to data hiding technology, this paper is combined with secret image sharing. We use Progressive Secret Image Sharing (PSIS) that the secret image is divided into multiple regions and hidden in N stego images. If the recipient wants to extract the secret image, the recipient must have a part of or all stego images to extract a similar secret image or a complete secret image. In this paper, we propose the method of secret image sharing based on GEMD data hiding. The secret image is not in sequence, but can be overlapped and divided. The experimental results present that the stego images are PSNR ≥ 50dB. The recipient can extract be similar or complete with stego images and judge whether stego images is tampered or not. © Springer Nature Switzerland AG 2020.

关键词： Steganography

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Study and Analysis of Hadoop Cluster Optimization based on configuration properties

Study and Analysis of Hadoop Cluster Optimization based on c...

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International Conference on Innovations in Power and Advanced computing Technologies

作者： Motahar Reza Badrinath Tripathy Harsh Ranjan G. Anant Kumar High Performance Computing Lab School of Computer Science and Engineering National Institute of Science and Technology Berhampur-761008 India

ISBN: (纸本)9781509056835

Hadoop framework consists of multiple components. One set of configuration parameters may not be suitable for all types of applications. Hence, for optimum performance, each framework parameter needs to be carefully chosen and adjusted. This paper highlights some of the important configuration properties related to Block size, memory allocation, CPU allocation, Number of MapReduce jobs, Job scheduling and JVM which should be tuned for improved Hadoop application performance. The result of some Benchmark problems are analyzed.

关键词： Hadoop framework JVM CPU Allocation Benchmark

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