A Privacy-Preserving Cross-domain Network access Services Using Sovrin Identifier

The number of cross-domain roaming users through Wi-Fi has expanded considerably in recent years. It is important to authenticate users from various institutions to ensure the confidentiality and reliability of the network. Existing solutions like eduroam utilize a centralized framework to identify user's accounts that generate confidentiality and security concerns. We propose a blockchain-based cross-domain authentication mechanism that provides accountability and anonymity without any third-party dependence. In contrast to previous centralized ways, our scheme authenticates its user and server anonymously and widely distributed way of delivering roaming service without privacy breaching concerns. Using a Hyperledger blockchain, we integrate our system with Sovrin identifier to authenticate the user that retains confidentiality and reliability when the user accesses the network.