Pervasive Edge Computing(PEC) is an emerging paradigm for the Industrial Internet of Things(IIoT), and software-defined networks(SDN) offer lower latency services and massive intelligent devices connectivity for the IIoT. However, the PEC has some issues with data security and privacy while PEC devices sharing data among edges. What's more, the centralized SDN suffers from single point of attacks such as DDoS from IIoT devices and has the challenge of data leakage. In this paper, we use blockchain and proxy reencryption(PRE) technologies to tackle these challenges. The blockchain authorizes all devices in the network to improve their credibility and authenticity. In addition, a blockchainbased data sharing framework that combines a PRE scheme is introduced for secure device-to-device communication in PEC environments. A series of smart contracts are designed for flexible operations of searching and updating records on the blockchain. The experiments reveal that our design is highly efficient and has high performance.
The Notarial Office(NO), working on providing various essential certificates, still relies on manual handling and requires paper materials from other government departments. That brings lots of inconvenience. The Notarial Office rejects non-local paper materials for their lower credibility in the local place and then cannot provide cross-borders services. It also easily cause sensitive information leakage as copies of paper materials have been stored. In this case, a blockchain-based system is suitable to address challenges in this scenario because of its advantages (e.g, decentralized, immutability, transparency, auditability). We implemented this system on top of the Hyperledger Fabric. Moreover, we replace manual operations with smart contracts, set extra ledgers to off-load different types of transactions and provide encryption for private information when needed. In the end, we get an expected result. That is, the modification outperformed the unmodified network in experiments.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.