Secure smart contracts for cloud‐based manufacturing using Ethereum blockchain

The sharing of electronic health records (EHR) helps the patients increase the accuracy of treatment, while promoting the development of the hospital and the research of medical field compared to traditional paper-based medical records.However, due to the sensitivity of medical data and the difference of the standard about EHR, it is likely to lead to some security problems such as the leakage of patient's privacy and the difficulty of data sharing. To accomplish the secure storage and effective sharing of EHR, we propose an efficient and anonymous multi-message and multi-receiver EHR sharing scheme without secure channel based on blockchain (BEAMMRS). We use blockchain technology and cloud server to store EHR together, which ensures the security and immutability.Moreover, we combine certificateless public key cryptography and elliptic curve cryptography (ECC) to solve the certificate management burden and key escrow problems. Our scheme utilizes multi-message and multi-receiver signcryption algorithm to enable medical data providers to send different messages to multiple data requesters by executing one signcryption operation, which satisfies the multi-message sending requirements of the data providers in the communication environment. Meanwhile, the key generation center (KGC) sends the pseudo partial private key to the data user through the public channel. Only the authorized data user can successfully find out the real partial private key, which avoids the key leakage and economic cost caused by the secure channel. Security analysis and performance evaluation demonstrate that the proposed BEAMMRS scheme meets stronger security and higher computational efficiency than other similar schemes.

Section: Smart Contractmentioning

confidence: 99%

Efficient and anonymous multi‐message and multi‐receiver electronic health records sharing scheme without secure channel based on blockchain

Yang

et al. 2021

“…The element of blockchain brilliant agreements enables to program the blockchain to oversee exchanges among members engagement while getting to the information 14 . An autonomous system and machine can learn and adjust to several situations after some period, and settle on trusted and precise choice results which are confirmed and approved by all mining hubs of the blockchain 15‐17 . Thus, such choices cannot be discredited and may be followed and confirmed by everyone taking an interest element.…”

Section: Introductionmentioning

confidence: 98%

Artificial intelligence and blockchain: A review

Hussain¹,

Al‐Turjman²

2021

It is irrefutable that blockchain and artificial intelligence (AI) paradigms are spreading at an incredible rate. The two paradigms have distinctive level of innovative nature and multidimensional business propositions. Blockchain innovation can robotize instalments to grant a way for exchanging personal records, information, and logs in a secure, and decentralized manner and can be revealed digitally in the digital currency era. As of late, blockchain and AI are two of the most trending technologies. Blockchain can administer connections among members with no mediator via smart contracts. AI, then, offers insight and dynamic capacities for machines just like people. In this survey, we provide a comprehensive overview about the applications of AI in blockchain. We audit, and sum up the rise of blockchain applications, and stages explicitly focusing on the AI research area. We likewise recognize and summarize open challenges in using blockchain and AI techniques. We also classify the effect of the cloud with these two innovations with respect to the computerized economy, which includes Blockchain as a Cloud and Blockchain as a Service. We moreover survey difficulties and issues identified while provisioning these technologies. It has been found that the integration of AI and blockchain is trusted to make various prospects. Such techniques provide scientists and authorities with an accuracy of up to 90% when taken properly into consideration.

“…Smart contracts can facilitate the construction of decentralized applications, which expands the application of blockchain to areas that are way beyond the cryptocurrency, such as healthcare, [7][8][9] Internet of Things (IoT), [10][11][12][13][14] digital identity, 15,16 copyright protection, 17 voting, 18 economy sharing, 19,20 and many others. [21][22][23][24][25][26][27] However, with the rapid development and application of smart contracts, many security issues have emerged. Attacks as the result of contract vulnerabilities have caused the loss of a large amount of money.…”

Section: Introductionmentioning

confidence: 99%

Security enhancement technologies for smart contracts in the blockchain: A survey

Wang

Zhu

et al. 2021

Smart contract has shown its potential in cutting down the cost of administration through reshaping conventional business processes and in expanding the application of blockchain to areas that are beyond the cryptocurrency. However, with the rapid development and wide application of smart contracts, security issues have become a serious concern and have thus attracted widespread attention. As the result, a great deal of effort has been spent on improving and supporting secure development and on the application of smart contracts by introducing new and advanced vulnerability detection and privacy protection techniques in recent years. There is therefore the need for a comprehensive review of the new development on security enhancement technologies of smart contracts for the blockchain. This paper provides a review of the current research status and advances in smart contract security based on related literature published in recent years. Our review is divided into six categories along the line of the technology, which includes symbolic execution, abstract interpretation, fuzz testing, formal verification, deep learning, and privacy enhancement. A comparison of the various tools and methods developed to tackle security issues is provided. Challenges in the research of smart contract security as well as future directions are discussed. This paper intends to provide the inspiration and reference for follow-up research on the security issues of smart contracts in the blockchain.