Blockchain Based Secured Multipurpose Identity (SMID) Management System for Smart Cities

Blockchain, the decentralized architecture and distributed public ledger technology intended to provide a secure, irreversible and transparent information management platform for practically any application which also plays a vital role in establishing the future of cities. In today's digital era, identifying an individual is one of the most critical concerns for business and many other public institutions. Digital identity plays a vital role in this sector as the data may be used to identify an individual and his fundamental qualities like name, address, health status, credit score and others. In this paper, we will look at how Blockchain can be used to secure digital identity which is a trustworthy idea that describes how people can use or what type of attribute or parameter can be used to identify someone's identity. The identity is used for different kind of application which is typically decentralized and any or-ganization can take control over the identity data which reasons a large number of identity fraud. The idea is to build a single multipurpose identity that will be secured using Blockchain technology. Instead of several identification documents, Users can use this single multipurpose identity to prove their identity in various sectors such as the government and other private sectors to access particular services. Automated and real-time identity verification through smart contracts can verify the identity data. The Blockchain will provide a tamper-proof method of storing documents or data that can be audited by the government and ensures the User's transparency through Blockchain by showing the record of activity.