A literature review of blockchain technology applications in supply chains: A comprehensive analysis of themes, methodologies and industries

Blockchain based solutions to secure IoT: Background, integration trends and a way forward

An Integration of blockchain and AI for secure data sharing and detection of CT images for the hospitals.

An efficient identity-based signature scheme without bilinear pairing for vehicle-to-vehicle communication in VANETs

An efficient conditional privacy-preserving authentication scheme for Vehicle-To-Infrastructure communication in VANETs

A blockchain-based certificateless public key signature scheme for vehicle-to-infrastructure communication in VANETs

Security and privacy of sensitive data are crucial nowadays. Internet of things (IoTs) is emerging and has brought critical security issues. Wireless body networks (WBANs) as one branch of IoTs are vulnerable systems today because they carry sensitive information from implanted and wearable sensors. Authentication and key agreement for WBAN are important to protect its security and privacy. Several authentication and key agreement protocols have been proposed for WBANs. However, many of them are administered by a single server. Addition to that, a malicious key generation center can become a threat to other entities in WBANs, i.e impersonate the user by causing a key escrow problem. In this paper, we propose a certificateless authenticated key agreement (CLAKA) for a decentralized/blockchain WBAN in the first phase. CLAKA has advantage to be designed in a decentralized architecture that is suitable for low computation devices. A security mediated signature (SMC) for blockchain authentication is described in the second phase of our protocol. SMC has advantage in solving public key revocation while maintaining the characteristics of certificateless public key cryptography i.e. solving the key escrow problem. Our protocol can compute a session key between WBAN controller and blockchain node and verify the eligibility of node to collect WBAN data.

Certificateless Authenticated Key Agreement for Decentralized WBANs

In the past, more research has been undertaken on the security of the smart grid (SG), with the aim of securing the SG in a manner that takes into account devices with limited resources, e.g., smart meters (SM). Consequently, several protocols for authenticating communicating participants in the SG and safeguarding the transfer of their keys have been devised over the years. However, most existing protocols work in a homogeneous context, which means that different entities operate in the same cryptographic settings. In addition, the majority of them are subject to a single point of failure, meaning that if a central device fails, all connected devices fail as well. To mitigate the previously mentioned issues and maintain the security of the SG network, an authentication protocol for heterogeneous blockchain-based smart grid environment (AP-HBSG) is designed. In the first part, an anonymous and heterogeneous certificateless authentication protocol is designed to secure and execute the session key agreement process. In addition, one participant belongs to a certificateless public cryptography (CL-PKC) whereas the other participant belongs to a public key infrastructure (PKI). In the second part, a blind signature is used to add authentication security within the blockchain nodes. Besides, a random oracle model (ROM) is used for the security analysis of the proposed protocol and we prove that it is secure under discrete logarithm (DL) problem and computational Diffie-Hellman (CDH) problem. The performance analysis shows that our proposed protocol has a lower computational and communication cost than other recently proposed protocols. 

Mwitende Gervais

Papers

A blockchain-based certificateless public key signature scheme for vehicle-to-infrastructure communication in VANETs

Certificateless Authenticated Key Agreement for Decentralized WBANs

AP-HBSG: Authentication Protocol for Heterogeneous Blockchain-Based Smart Grid Environment