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Iraqi Journal for Computer Science and Mathematics 2022年第1期3卷 53-63页

作者： Al-Barazanchi, Israa Murthy, Aparna Al Rababah, Ahmad Abdul Qadir Khader, Ghadeer Abdulshaheed, Haider Rasheed Rauf, Hafiz Tayyab Daghighi, Elika Niu, Yitong Baghdad College Economic Sciences University Baghdad Iraq Malaysia Professional Engineers in Ontario North YorkONM2N 6K9 Canada Faculty of Computing and Information Technology King Abdulaziz University Rabigh21911 Saudi Arabia Masters of Applied Sciences in Engineering Physics Stoke-on-Trent United Kingdom Centre for Smart Systems AI and Cybersecurity Staffordshire University Stoke-on-Trent United Kingdom Technical and Vocational University Tehran Iran Belarusian-Russian University Mira Avenue 43 Mogilev212000 Belarus

After a long period of development, blockchain innovation has received much attention from scholars and industry practitioners alike. This innovation allows the issuance of smart contracts, which are utilised to automate and execute deals amongst clients. Blockchain is also being used nowadays by a few IT applications as a specialised foundation. This technology also prevents the duplication of information similar to what is being done with Bitcoin and other cryptocurrencies. Specifically, Bitcoin records are virtually impossible to alter as this cryptocurrency is being traded amongst hundreds of thousands of servers. Therefore, to launch a successful attack, the aggressor should change the Bitcoin records of 51% of these servers simultaneously. The cost of such effort significantly exceeds the potential payoff. Meanwhile, private data that are stored on single servers, such as Amazon and Google, are prone to malicious attacks. Therefore, in this paper, we propose the use of blockchain to solve the security issues in the Internet of Things (IOT). We initially identify and categorise the prevalent security issues, particularly data privacy, being faced in IoT in expansion to conventions utilized for organizing, communication, and administration. Afterwards, we formulate some security measures for IoT and illustrate scenarios where blockchain is being used in IoT applications. © 2022 Iraqi Journal for Computer Science and Mathematics. All rights reserved.

关键词： Network security

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ACQUISITION REFORM AND BEST PRODUCT PROCUREMENT - AN engineering VIEW

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NAVAL ENGINEERS JOURNAL 1994年第6期106卷 41-57页

作者： FISHER, DA SKOLNICK, A He has been involved with several weapon system developments. Among these were the Trident II fire control and navigation systems the BSY-I Anti-Submarine Warfare System and the Navy standard computers (UYK44 and EMSP). He served as manager of the Digital Circuits Engineering Branch and was then appointed as manager of the Automatic Test Equipment (ATE) Technology Division. As manager of the ATE Technology Division he was responsible for the SP-23 Fire Control System Support Project the SP-24 Navigation Project and the Fleet Progressive Maintenance Program (2M/ATE). This Division was responsible for selection and application of electronic product technology and for developing fleet test and repair techniques. He holds a B.S. in Electrical Engineering from the University of Evansville and is currently pursuing a Masters of Public Administration at Indiana University-Purdue University Indianapolis. Dr. Alfred Skolnick:retired from the Navy in 1983 with the rank of captain. He is president of System Science Consultants (SSC) specializing in strategic planning technical program definition technology assessment and engineering analyses on selected matters of national interest. Dr. Skolnick taught mathematics and management sciences at University of Virginia and Marymount University. He is adjunct faculty at Northern Virginia Community College. From 1985 to 1989 he was president of the American Society of Naval Engineers. In the Navy he served at Applied Physics Laboratory/The Johns Hopkins University then aboard USSBoston(CAG-1) and played leading roles in several weapon system developments inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. In 1975 he became a major project manager and led the Navy's High Energy Lasers Program in 1981 he was assigned all Navy Directed Energy Weapons development efforts. He was vice president advanced tech

The military services are being moved in the direction of performance-based specifications and standards. They are being steered against dictating ''how to'' produce an item since such action forecloses on the ability to gain access to components or technology that may have a commercial equivalent. Why should the engineering community embrace the new approach? Aside from the obvious weight of it being approved policy, therefore currently mandated, it warrants examination because it is the correct approach at this time when applied to appropriate products. Military specifications and standards are to be displaced then, by acceptable alternative contractor design solutions. Industry bidders will be allowed to propose the particular design details, permitting procurement flexibility by contractually citing only system level or interface requirements, both physical and functional. Hopefully, this can broaden the industrial base and increase competition with reduced costs to follow. Conceptually, the approach appears both performance-sensible and cost-attractive (there are, of course, consequent risks) but how does implementation proceed? Is it possible to pursue the goals envisioned along paths that are not in themselves experimental? Can the American postulate, minimal loss of life and limb to U.S. military people, continue to be honored? Experience and track record elsewhere imply encouraging possibilities in select situations-useful prospects are identified and discussed in practical terms.

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