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P2V-Fabric: Privacy-Preserving Video Using Hyperledger Fabric
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作者 muhammad saad Ki-Woong Park 《Computers, Materials & Continua》 2025年第5期1881-1900,共20页
Theproliferation of Internet of Things(IoT)devices introduces substantial security challenges.Currently,privacy constitutes a significant concern for individuals.While maintaining privacy within these systems is an es... Theproliferation of Internet of Things(IoT)devices introduces substantial security challenges.Currently,privacy constitutes a significant concern for individuals.While maintaining privacy within these systems is an essential characteristic,it often necessitates certain compromises,such as complexity and scalability,thereby complicating management efforts.The principal challenge lies in ensuring confidentiality while simultaneously preserving individuals’anonymity within the system.To address this,we present our proposed architecture for managing IoT devices using blockchain technology.Our proposed architecture works on and off blockchain and is integrated with dashcams and closed-circuit television(CCTV)security cameras.In this work,the videos recorded by the dashcams and CCTV security cameras are hashed through the InterPlanetary File System(IPFS)and this hash is stored in the blockchain.When the accessors want to access the video,they must pass through multiple authentications which include web token authentication and verifiable credentials,to mitigate the risk of malicious users.Our contributions include the proposition of the framework,which works on the single key for every new video,and a novel chaincode algorithm that incorporates verifiable credentials.Analyses are made to show the system’s throughput and latency through stress testing.Significant advantages of the proposed architecture are shown by comparing them to existing schemes.The proposed architecture features a robust design that significantly enhances the security of blockchain-enabled Internet of Things(IoT)deviceswhile effectively mitigating the risk of a single point of failure,which provides a reliable solution for security concerns in the IoT landscape.Our future endeavors will focus on scaling the system by integrating innovative methods to enhance security measures further. 展开更多
关键词 Blockchain IOT hyperledger fabric verifiable credentials PRIVACY
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单髁与全膝关节置换术治疗膝单间室骨性关节炎对患者围手术期凝血指标及失血量的影响 被引量:38
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作者 杨天翔 张晋宁 +3 位作者 张博文 程萌旗 陈德胜 《陕西医学杂志》 CAS 2022年第6期684-687,691,共5页
目的:研究单髁膝关节置换术(UKA)与全膝关节置换术(TKA)治疗膝单间室骨性关节炎对患者围手术期凝血指标及失血量的影响。方法:回顾性分析因膝关节单间室骨性关节炎行单侧人工膝关节置换术的77例患者的临床资料。依据手术方式不同将患者... 目的:研究单髁膝关节置换术(UKA)与全膝关节置换术(TKA)治疗膝单间室骨性关节炎对患者围手术期凝血指标及失血量的影响。方法:回顾性分析因膝关节单间室骨性关节炎行单侧人工膝关节置换术的77例患者的临床资料。依据手术方式不同将患者分为UKA组(28例)和TKA组(49例)。检测并记录两组患者围术期凝血相关指标及围手术期失血量。记录围手术期下肢深静脉血栓(DVT)及肺栓塞发生情况。结果:两组患者术前D-二聚体、纤维蛋白原(FBG)水平比较差异无统计学意义(均P>0.05),但UKA组术后1 d、手术前后差值及比值低于TKA组(均P<0.05)。两组患者手术前后PT、TT、APTT、INR水平比较,差异无统计学意义(均P>0.05)。两组患者术前红细胞压积(Hct)及血红蛋白(Hb)水平比较差异无统计学意义(均P>0.05),但TKA组术后1、3 d低于UKA组(均P<0.05)。UKA组总失血量、隐性失血量及显性失血量少于TKA组(均P<0.05)。UKA组DVT发生率低于TKA组(P<0.05)。结论:UKA治疗膝关节单间室骨性关节炎,可减少围手术期对患者血液系统的影响,降低失血量及DVT发生率。 展开更多
关键词 膝骨性关节炎 单髁膝关节置换术 全膝关节置换术 围手术期 凝血指标 失血量
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Social Distancing and Isolation Management Using Machine-to-Machine Technologies to Prevent Pandemics 被引量:2
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作者 muhammad saad Maaz Bin Ahmad +2 位作者 muhammad Asif Khalid Masood Mohammad A.Al Ghamdi 《Computers, Materials & Continua》 SCIE EI 2021年第6期3545-3562,共18页
Social distancing and self-isolation management are crucial preventive measures that can save millions of lives during challenging pandemics of diseases such as the Spanish u,swine u,and coronavirus disease 2019(COVID... Social distancing and self-isolation management are crucial preventive measures that can save millions of lives during challenging pandemics of diseases such as the Spanish u,swine u,and coronavirus disease 2019(COVID-19).This study describes the comprehensive and effective implementation of the Industrial Internet of Things and machine-to-machine technologies for social distancing and smart self-isolation management.These technologies can help prevent outbreaks of any disease that can disperse widely and develop into a pandemic.Initially,a smart wristband is proposed that incorporates Bluetooth beacon technology to facilitate the tracing and tracking of Bluetooth Low Energy beacon packets for smart contact tracing.Second,the connectivity of the device with Android or iOS applications using long-term evolution technology is realized to achieve mobility.Finally,mathematical formulations are proposed to measure the distance between coordinates in order to detect geo-fencing violations.These formulations are specically designed for the virtual circular and polygonal boundaries used to restrict suspected or infected persons from trespassing in predetermined areas,e.g.,at home,in a hospital,or in an isolation ward.The proposed framework outperforms existing solutions,since it is implemented on a wider scale,provides a range of functionalities,and is cost-effective. 展开更多
关键词 Coronavirus disease 2019 PANDEMIC machine-to-machine industrial internet of things social distance geo-fencing
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Blockchain and IIoT Enabled Solution for Social Distancing and Isolation Management to Prevent Pandemics
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作者 muhammad saad Maaz Bin Ahmad +4 位作者 muhammad Asif muhammad Khalid Khan Toqeer Mahmood Elsayed Tag Eldin Hala Abdel Hameed 《Computers, Materials & Continua》 SCIE EI 2023年第7期687-709,共23页
Pandemics have always been a nightmare for humanity,especially in developing countries.Forced lockdowns are considered one of the effective ways to deal with spreading such pandemics.Still,developing countries cannot ... Pandemics have always been a nightmare for humanity,especially in developing countries.Forced lockdowns are considered one of the effective ways to deal with spreading such pandemics.Still,developing countries cannot afford such solutions because these may severely damage the country’s econ-omy.Therefore,this study presents the proactive technological mechanisms for business organizations to run their standard business processes during pandemic-like situations smoothly.The novelty of this study is to provide a state-of-the-art solution to prevent pandemics using industrial internet of things(IIoT)and blockchain-enabled technologies.Compared to existing studies,the immutable and tamper-proof contact tracing and quarantine management solution is proposed.The use of advanced technologies and information security is a critical area for practitioners in the internet of things(IoT)and corresponding solutions.Therefore,this study also emphasizes information security,end-to-end solution,and experimental results.Firstly,a wearable wristband is proposed,incorporating 4G-enabled ultra-wideband(UWB)technology for smart contact tracing mechanisms in industries to comply with standard operating procedures outlined by the world health organization(WHO).Secondly,distributed ledger technology(DLT)omits the centralized dependency for transmitting contact tracing data.Thirdly,a privacy-preserving tracing mechanism is discussed using a public/private key cryptography-based authentication mechanism.Lastly,based on geofencing techniques,blockchain-enabled machine-to-machine(M2M)technology is proposed for quarantine management.The step-by-step methodology and test results are proposed to ensure contact tracing and quarantine management.Unlike existing research studies,the security aspect is also considered in the realm of blockchain.The practical implementation of the proposed solution also obtains the results.The results indicate the successful implementation of blockchain-enabled contact tracing and isolation management using IoT and geo-fencing techniques,which could help battle pandemic situations.Researchers can also consider the 5G-enabled narrowband internet of things(NB-IoT)technologies to implement contact tracing solutions. 展开更多
关键词 Blockchain contact tracing distributed ledger technology geo-fencing internet of things industrial internet of things isolation management social distancing ULTRA-WIDEBAND
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A Framework for Enhancing Privacy and Anonymity in Blockchain-Enabled IoT Devices
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作者 muhammad saad muhammad Raheel Bhutta +1 位作者 Jongik Kim Tae-Sun Chung 《Computers, Materials & Continua》 SCIE EI 2024年第3期4263-4282,共20页
With the increase in IoT(Internet of Things)devices comes an inherent challenge of security.In the world today,privacy is the prime concern of every individual.Preserving one’s privacy and keeping anonymity throughou... With the increase in IoT(Internet of Things)devices comes an inherent challenge of security.In the world today,privacy is the prime concern of every individual.Preserving one’s privacy and keeping anonymity throughout the system is a desired functionality that does not come without inevitable trade-offs like scalability and increased complexity and is always exceedingly difficult to manage.The challenge is keeping confidentiality and continuing to make the person innominate throughout the system.To address this,we present our proposed architecture where we manage IoT devices using blockchain technology.Our proposed architecture works on and off blockchain integrated with the closed-circuit television(CCTV)security camera fixed at the rental property.In this framework,the CCTV security camera feed is redirected towards the owner and renter based on the smart contract conditions.One entity(owner or renter)can see the CCTV security camera feed at one time.There is no third-party dependence except for the CCTV security camera deployment phase.Our contributions include the proposition of framework architecture,a novel smart contract algorithm,and the modification to the ring signatures leveraging an existing cryptographic technique.Analyses are made based on different systems’security and key management areas.In an empirical study,our proposed algorithm performed better in key generation,proof generation,and verification times.By comparing similar existing schemes,we have shown the proposed architectures’advantages.Until now,we have developed this system for a specific area in the real world.However,this system is scalable and applicable to other areas like healthcare monitoring systems,which is part of our future work. 展开更多
关键词 PRIVACY ANONYMITY blockchain IOT smart contracts
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