scholarly journals COVID-19 Contact Tracing using Blockchain

Author(s):  
Haya R. Hasan ◽  
Khaled Salah ◽  
Raja Jayaraman ◽  
Ibrar Yaqoob ◽  
Mohammed Omar ◽  
...  

Contact tracing has widely been adopted to control the spread of Coronavirus-2019 (COVID-19). It enables to identify, assess, and manage people who have been exposed to COVID-19, thereby preventing from its further transmission. Today's most of the contact tracing approaches, tools, and solutions fall short in providing decentralized, transparent, traceable, immutable, auditable, secure, and trustworthy features. In this paper, we propose a decentralized blockchain-based COVID-19 contact tracing solution. Contact tracing can greatly suffice the need for a speedy response to a pandemic. We leverage the immutable and tamper-proof features of blockchain to enforce trust, accountability, and transparency. Trusted and registered oracles are used to bridge the gap between on-chain and off-chain data. With no third parties involved or centralized servers, the users' medical information is not prone to invasion, hacking, or abuse. Each user is registered using their digital medical passports. To respect the privacy of the users, their locations are updated with a time delay of 20 minutes. Using Ethereum smart contracts, transactions are executed on-chain with emitted events and immutable logs. We present details of the implemented algorithms and their testing analysis. We evaluate the proposed approach using security, cost, and privacy parameters to show its effectiveness. The smart contracts code is publicly made available on GitHub.

2021 ◽  
Author(s):  
Haya R. Hasan ◽  
Khaled Salah ◽  
Raja Jayaraman ◽  
Ibrar Yaqoob ◽  
Mohammed Omar ◽  
...  

Contact tracing has widely been adopted to control the spread of Coronavirus-2019 (COVID-19). It enables to identify, assess, and manage people who have been exposed to COVID-19, thereby preventing from its further transmission. Today's most of the contact tracing approaches, tools, and solutions fall short in providing decentralized, transparent, traceable, immutable, auditable, secure, and trustworthy features. In this paper, we propose a decentralized blockchain-based COVID-19 contact tracing solution. Contact tracing can greatly suffice the need for a speedy response to a pandemic. We leverage the immutable and tamper-proof features of blockchain to enforce trust, accountability, and transparency. Trusted and registered oracles are used to bridge the gap between on-chain and off-chain data. With no third parties involved or centralized servers, the users' medical information is not prone to invasion, hacking, or abuse. Each user is registered using their digital medical passports. To respect the privacy of the users, their locations are updated with a time delay of 20 minutes. Using Ethereum smart contracts, transactions are executed on-chain with emitted events and immutable logs. We present details of the implemented algorithms and their testing analysis. We evaluate the proposed approach using security, cost, and privacy parameters to show its effectiveness. The smart contracts code is publicly made available on GitHub.


Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 203
Author(s):  
Antonio López Vivar ◽  
Alberto Turégano Castedo ◽  
Ana Lucila Sandoval Orozco ◽  
Luis Javier García Villalba

Smart contracts have gained a lot of popularity in recent times as they are a very powerful tool for the development of decentralised and automatic applications in many fields without the need for intermediaries or trusted third parties. However, due to the decentralised nature of the blockchain on which they are based, a series of challenges have emerged related to vulnerabilities in their programming that, given their particularities, could have (and have already had) a very high economic impact. This article provides a holistic view of security challenges associated with smart contracts, as well as the state of the art of available public domain tools.


Author(s):  
Ashmita Pandey

Abstract: A decentralised, Secure, Peer-to-Peer Multi-Voting System on Ethereum Blockchain is a distributed ledger technology (DLT) that permits virtual votes to be transacted in a peer-to-peer decentralized network. Those transactions are validated and registered through every node of the network, so creating a transparent and immutable series of registered events whose truthfulness is supplied through a consensus protocol. Smart contract automates the execution of agreement that runs routinely as soon as the conditions are satisfied. Smart contract would not need any third parties consequently prevents time loss. By Eliminating the requirement for third parties, consequently, allows numerous processes to be extra efficient and economical. The system is secure, reliable, and anonymous. Smart contract is enforced for the Ethereum network using the Ethereum wallets and also the Solidity language. Users are capable of submit their votes immediately from their Ethereum wallets, and those transaction requests is handled with the consensus of each single Ethereum node. This creates a transparent environment for evoting. A lot of concerning efficiency of the peer-to-peer decentralized electoral system on Ethereum network along with application and the outcomes of implementation are provided in this paper. Keywords: Blockchain, Distributed Ledger Technology (DLT), Consensus Protocol, Smart Contracts, Ethereum, Solidity


Information ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 6
Author(s):  
Giulio Caldarelli

Blockchains are traditionally blind to the real world. This implies reliance on third parties called oracles when extrinsic data are needed for smart contracts. Oracle implementation, however, is still controversial and debated due to the reintroduction of trust and a single point of failure. The blindness to the real world also makes blockchains unable to communicate with each other, preventing any form of interoperability. This limitation prevents, for example, liquidity held in Bitcoin from flowing into DeFi applications. An early approach to the interoperability issue is constituted by “wrapped tokens”, representing blockchain native tokens issued on a non-native blockchain. Similar to how oracles reintroduce trust and a single point of failure, the issuance of wrapped tokens involves third parties whose characteristics need to be considered when evaluating the advantages of “crossing-chains”. This paper provides an overview of the available wrapped tokens and the main issuing procedures. Benefits, limitations, and implications for trust are listed and discussed.


2021 ◽  
Vol 3 (2) ◽  
pp. 9-22
Author(s):  
Predrag Cvetković

The hold-up problem is a form of opportunistic behavior of contractual partners. It occurs when the optimal volume and structure of transactions cannot be defined with ex ante certainty. The consequence of the hold-up problem is that, once a contractual relationship has been established, one of the parties seeks to modify the distribution of benefits in such a way that it has a higher level of profit from the contract than is justified by the contractual investments it has made. The paper examines the potential of the Blockchain concept to, applied as a framework of "smart" contracts, contribute to the elimination or reduce opportunities for the emergence of a hold-up situation. The Blockchain concept with its characteristics (transparency, protection of data integrity, shareability) deploys the foregoing potential in three ways: by witnessing the transaction via the Blockchain; ensuring the execution of a (by Blockchain certified) transaction; by verifying transactions through a decentralized system that replaces verification by third parties (courts or arbitration). Consequently, the Blockchain concept for storing and managing information substitutes the role played by the institute of trust in the classical ("analog") legal relationship.


Proceedings ◽  
2018 ◽  
Vol 2 (19) ◽  
pp. 1230 ◽  
Author(s):  
Tomás Robles ◽  
Borja Bordel ◽  
Ramón Alcarria ◽  
Diego Sánchez-de-Rivera

Blockchain enables the creation of distributed ledgers as a type of database that is shared, replicated, and synchronized among the members of a network. In this paper we analyze how distributed ledgers can be used for empowering end-users to self-manage their own data, enabling third parties to access those data under a cryptographic management model. We propose a use case where both blockchain and smart contracts are employed by using cryptographic technology to enable user empowerment of data management in AmI. Finally, we analyze strengths and weaknesses of the proposed scenario.


2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S165-S165
Author(s):  
Paul Persaud ◽  
Jin S Suh ◽  
Kate Bond ◽  
Alicia Espinal-Mesa ◽  
Bennett Suh

Abstract Background During the COVID-19 pandemic, contact tracing program as part of a larger epidemiological case investigation was effectively implemented by the local department of health in Paterson, NJ. The Paterson Communicable Disease Strike Team (PCDST) was established by leveraging skills and using existing public health staff of the health department team which led to a timely and robust public health intervention. Methods PCDST comprised of 25 communicable disease investigators/contact tracers established in preparation for public health response in the event of large-scale communicable disease outbreaks pre-COVID. In March 2020 with initial COVID-19 cases in Paterson, PCDST was activated utilizing NJ DOH’s Communicable Disease Reporting and Surveillance System (CDRSS). Additional staff members were cross-trained to augment team as new cases surged. A triage coordinator would identify and assign new cases to disease investigators at a 24/7 schedule. Disease Investigators would provide test results, perform epidemiological case interviews, elicit close contacts, and provide isolation/quarantine recommendations. Case-contact monitors followed up daily basis until completion of isolation/quarantine period. Results As of June 15, 2020, 6537 cases tested COVID-19 (+) in Paterson, NJ. 91% of cases and their contacts were interviewed. Peak occurred in mid-April with 263 cases on a single day. By mid-June, daily number of cases declined to 7/day. Reported COVID-19 mortality rate in Paterson (4.65%), compared to surrounding towns in the same county of Passaic (6%), other large cities in New Jersey (Newark 8%, Jersey City 7.4%) and New Jersey state (7.59%). Conclusion Despite limited resources, we were able to cross train and engage our frontline public health team (PCDST) to investigate and effectively contact trace new COVID-19 cases to help contain spread of infection. Although its unclear if our intervention impacted mortality rates, it is certain that contact tracing using a trained public health workforce is a model that has proven successful in Paterson. A local public health workforce vested in their communities can develop rapport needed to build trust and confidence in an intervention that elicits confidential medical information to limit viral transmission. Disclosures All Authors: No reported disclosures


2020 ◽  
pp. 172-174
Author(s):  
N.O. Lisnevska

Background. Medical secrecy (MS) is a set of information about the disease, its treatment, the results of examinations, which became known to certain healthcare workers (HCW) during their professional activities. The attending physician and the nurse who performs the drug administration are most aware of the patient’s condition. The information included in the MS is divided into two types: medical and personal information of the patient, which became known during the performance of medical professional duties. Objective. To describe selected aspects of the MS problem. Materials and methods. Analysis of the legal framework. Results and discussion. Medical information belongs to professional confidential information and should not be disclosed. Even the information about the very fact of seeking medical care belongs to professional confidential information. Unlawful intentional disclosure of MS by a person to whom it became known in the course of its professional duties entails criminal liability. This applies not only to HCW, but also to other staff of medical institutions. It is possible to provide information about the treatment and even the patient’s stay in the hospital to third parties, including relatives of any degree of kinship, only with the patient’s own consent. Exceptions include cases of extreme urgency, such as when a patient is taken to hospital unconscious and relatives can provide information on existing allergies and comorbidities. Of course, in such cases, the necessary disclosure limits should be followed. If a relative or other person wishes to visit a patient in the hospital, he or she should be contacted in person and visited only with personal consent. With regard to law enforcement officers, the answer to the question of whether a particular patient is treated in this institution should be given only in the presence of criminal proceedings and after resolving this issue with the chief physician. It should be noted that medical information concerning the deceased is also confidential and cannot be disclosed. It should not be assumed that the deceased can no longer be harmed, so any liability will be absent. Disclosure of such information is also a crime, on the basis of which criminal proceedings may be started. Recently, the medical legislation in Ukraine was changed, and as of today, the fine for disclosing MT is over UAH 50,000. When treating patients with disabilities, all necessary information should be provided to their parents or carers. When treating children aged 14-18, it is impossible not to provide information about treatment to parents, although this may be contrary to the wishes of the child. An important issue is the provision of information to children who are incapacitated by age, but legally capable. If a 5-year-old child asks questions about his or her health, a doctor or other HCW must answer them in a form that is accessible. A similar situation occurs with mentally ill patients: they are deprived of legal capacity, but they have the right to know about their health. You should also be very careful in keeping medical records. For example, information on viral infections (hepatitis, HIV/AIDS) should not be placed on the cover of the medical history, but inside. Conclusions. 1. MS information is divided into two types: medical and personal information of the patient. 2. Medical information belongs to professional confidential information and should not be disclosed. 3. It is possible to provide information about the treatment and even the patient’s stay in the hospital to third parties, including relatives, only with the patient’s own consent. 4. In the treatment of patients with disabilities, all necessary information should be provided to the parents or carers.


2021 ◽  
Vol 5 (4) ◽  
pp. 636
Author(s):  
I Ketut Gunawan ◽  
Ninda Lutfiani ◽  
Qurotul Aini ◽  
Fitria Marwati Suryaman ◽  
Abas Sunarya

Blockchain which includes smart contract and tokenization features is the latest technology in the world, especially Indonesia. Smart contracts and tokenization make it very easy for users and can maintain valid data security, but there are still many universities that have not implemented the system so they have to involve many parties and costs. The problem taken in this study is the payment process for transactions such as credit and data processing that is vulnerable to illegal data leakage. This study aims to develop a smart contract system and blockchain tokenization in universities in the payment transaction process. The method used in this research is literature review analysis and testing method. The implementation of smart contracts and tokenization can replace third parties as security guards of transaction data with all Blockchain users paying attention and ensuring the integrity of the entire process and activity. This of course can avoid problems that arise from the presence of third parties in the transaction process. So it can be concluded that the implementation of smart contracts and Blockchain tokenization in payment transactions is the right solution to be applied in the payment transaction process at universities.


Author(s):  
Almir Karabegovic ◽  
Mirza Ponjavic ◽  
Mirsada Hukic

The outbreak of COVID-19 is a public health emergency that caused disastrous results in many countries. The global aim is to stop transmission and prevent the spread of the disease. To achieve it, every country needs to scale up emergency response mechanisms, educate and actively communicate with the public, intensify infected case finding, contact tracing, monitoring, quarantine of contacts, and isolation of cases. Responding to an emergency requires efficient collaboration and a multi-skilled approach (medical, information, statistical, political, social, and other expertise), which makes it hard to define one interface for all. As actors from different perspectives and domain backgrounds need to address diverse functions, the possibility to exchange available information quickly would be desirable. Geoportal provides an entry point to access a variety of data (geospatial data, epidemiological data) and could be used for data discovery, view, download, and transformation. It helps to deal with challenges like data analysis, confirmed cases geocoding, recognition of disease dynamics, vulnerable groups identification, and capacity mapping. Predicting and modeling the spread of infection, along with application support for communication and collaboration, are the biggest challenges. In response to all these challenges, we have established the Epidemic Location Intelligence System (ELIS) using open-source software components in the cloud, as a working platform with all the required functionalities.


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