11,836 research outputs found
HealthBlock: A Blockchain-IoT Fusion for Secure Healthcare Data Exchange
Managing healthcare data while ensuring its security and privacy is critical to providing quality care to patients. However, traditional approaches to healthcare data sharing have limitations, including the risk of data breaches and the lack of privacy-preserving mechanisms. This research paper proposes a novel hybrid blockchain-IoT approach for privacy-preserving healthcare data sharing that addresses these challenges. Our system incorporates a private blockchain for protected and tamper-proof data sharing, with privacy-preserving techniques such as differential privacy and homomorphic encryption to protect patient data. IoT devices are utilized to collect and transmit real-time data, equipped with privacy-preserving mechanisms such as data anonymization and secure transmission protocols. Our approach achieved an accuracy rate of 98% for access control and a 99.6% success rate for data privacy protection. Furthermore, our proposed system demonstrated improved data storage and retrieval performance, with a data storage overhead reduction of up to 86% and a data retrieval time reduction of up to 81%. These results indicate the potential of our approach to enhance the security, privacy, and efficiency of healthcare data management, contributing to improved patient care outcomes
Blockchain Application on the Internet of Vehicles (IoV)
With the rapid development of the Internet of Things (IoT) and its potential
integration with the traditional Vehicular Ad-Hoc Networks (VANETs), we have
witnessed the emergence of the Internet of Vehicles (IoV), which promises to
seamlessly integrate into smart transportation systems. However, the key
characteristics of IoV, such as high-speed mobility and frequent disconnections
make it difficult to manage its security and privacy. The Blockchain, as a
distributed tamper-resistant ledge, has been proposed as an innovative solution
that guarantees privacy-preserving yet secure schemes. In this paper, we review
recent literature on the application of blockchain to IoV, in particular, and
intelligent transportation systems in general
GraphSE: An Encrypted Graph Database for Privacy-Preserving Social Search
In this paper, we propose GraphSE, an encrypted graph database for online
social network services to address massive data breaches. GraphSE preserves
the functionality of social search, a key enabler for quality social network
services, where social search queries are conducted on a large-scale social
graph and meanwhile perform set and computational operations on user-generated
contents. To enable efficient privacy-preserving social search, GraphSE
provides an encrypted structural data model to facilitate parallel and
encrypted graph data access. It is also designed to decompose complex social
search queries into atomic operations and realise them via interchangeable
protocols in a fast and scalable manner. We build GraphSE with various
queries supported in the Facebook graph search engine and implement a
full-fledged prototype. Extensive evaluations on Azure Cloud demonstrate that
GraphSE is practical for querying a social graph with a million of users.Comment: This is the full version of our AsiaCCS paper "GraphSE: An
Encrypted Graph Database for Privacy-Preserving Social Search". It includes
the security proof of the proposed scheme. If you want to cite our work,
please cite the conference version of i
NFT-Based Blockchain-Oriented Security Framework for Metaverse Applications
The Metaverse is rapidly evolving, bringing us closer to its imminent
reality. However, the widespread adoption of this new automated technology
poses significant research challenges in terms of authenticity, integrity,
interoperability, and efficiency. These challenges originate from the core
technologies underlying the Metaverse and are exacerbated by its complex
nature. As a solution to these challenges, this paper presents a novel
framework based on Non-Fungible Tokens (NFTs). The framework employs the
Proof-of-Stake consensus algorithm, a blockchain-based technology, for data
transaction, validation, and resource management. PoS efficiently consume
energy and provide a streamlined validation approach instead of
resource-intensive mining. This ability makes PoS an ideal candidate for
Metaverse applications. By combining NFTs for user authentication and PoS for
data integrity, enhanced transaction throughput, and improved scalability, the
proposed blockchain mechanism demonstrates noteworthy advantages. Through
security analysis, experimental and simulation results, it is established that
the NFT-based approach coupled with the PoS algorithm is secure and efficient
for Metaverse applications.Comment: 10 page
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