Biblio

Social Internet of Vehicle (SIoV) has emerged as one of the most promising applications for vehicle communication, which provides safe and comfortable driving experience. It reduces traffic jams and accidents, thereby saving public resources. However, the wrongly communicated messages would cause serious issues, including life threats. So it is essential to ensure the reliability of the message before acting on considering that. Existing works use cryptographic primitives like threshold authentication and ring signatures, which incurs huge computation and communication overheads, and the ring signature size grew linearly with the threshold value. Our objective is to keep the signature size constant regardless of the threshold value. This work proposes MuSigRDT, a multisignature contract based data transmission protocol using Schnorr digital signature. MuSigRDT provides incentives, to encourage the vehicles to share correct information in real-time and participate honestly in SIoV. MuSigRDT is shown to be secure under Universal Composability (UC) framework. The MuSigRDT contract is deployed on Ethereum's Rinkeby testnet.

The outsourcing of databases is very popular among IT companies and industries. It acts as a solution for businesses to ensure availability of the data for their users. The solution of outsourcing the database is to encrypt the data in a form where the database service provider can perform relational operations over the encrypted database. At the same time, the associated security risk of data leakage prevents many potential industries from deploying it. In this paper, we present a secure outsourcing database search scheme (BASDB) with the use of a smart contract for search operation over index of encrypted database and storing encrypted relational database in the cloud. Our proposed scheme BASDB is a simple and practical solution for effective search on encrypted relations and is well resistant to information leakage against attacks like search and access pattern leakage.

Fog computing architecture allows the end-user devices of an Internet of Things (IoT) application to meet their latency and computation requirements by offloading tasks to a fog node in proximity. This fog node in turn may offload the task to a neighboring fog node or the cloud-based on an optimal node selection policy. Several such node selection policies have been proposed that facilitate the selection of an optimal node, minimizing delay and energy consumption. However, one crucial assumption of these schemes is that all the networked fog nodes are authorized part of the fog network. This assumption is not valid, especially in a cooperative fog computing environment like a smart city, where fog nodes of multiple applications cooperate to meet their latency and computation requirements. In this paper, we propose a secure task-offloading framework for a distributed fog computing environment based on smart-contracts on the blockchain. The proposed framework allows a fog-node to securely offload tasks to a neighboring fog node, even if no prior trust-relation exists. The security analysis of the proposed framework shows how non-authenticated fog nodes are prevented from taking up offloading tasks.

Peer to Peer (P2P) is a dynamic and self-organized technology, popularly used in File sharing applications to achieve better performance and avoids single point of failure. The popularity of this network has attracted many attackers framing different attacks including Sybil attack, Routing Table Insertion attack (RTI) and Free Riding. Many mitigation methods are also proposed to defend or reduce the impact of such attacks. However, most of those approaches are protocol specific. In this work, we propose a Blockchain based security framework for P2P network to address such security issues. which can be tailored to any P2P file-sharing system.