Hossain, Md. IqbalShakil, Md. ArifRahat, Abrarul HassanJoti, Tassnim JamanAkter, TaniaTasnin, HumayraRumon, Mamunur Rashid2022-02-062022-02-0620212021-09ID 17101313ID 17101345ID 17101037ID 17101071ID 17101156http://hdl.handle.net/10361/16100Cataloged from PDF version of thesis.Includes bibliographical references (pages 57-59).This thesis is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Computer Science and Engineering, 2021.Blockchain, the decentralized architecture and distributed public ledger technology that enables Bitcoin, has recently drawn a strong interest from governments, nancial institutions, and high-tech companies. In modern technological era, blockchain is intended to provide a secure, irreversible, and transparent information management platform for practically any application, and it also plays a vital role in establishing the future of cities. A major number of today's well-known crypto-stages are based on the Blockchain concept. In today's digital era, Identi cation of an individual is one of the most important concerns for businesses and many other public institutions. Digital identity has started playing 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 identities. Digital identity 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, as well as the various privacy concepts or concerns that are related with someone's identity. The identity is used for di erent kind of application which is typically decentralized and any organization can take control over the identity data which reasons a large number of identity fraud as well. The idea is to build a model for single multipurpose identity, which will be secured using blockchain technology. Instead of several identi cation 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. An automated and real time veri cation of identity 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. User will have control over which of their credential the service provider can access. Our model will also ensure that the user can see how his identity data was accessed by multiple vendors as whenever someone tries to access someone's identity and the user will be able to see how his identity data was used by looking into it as an individual.59 pagesenBrac University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.Block chainDigital identityInformation securitySecured identitySmart contractData miningMulti purposeBlockchains (Databases)Computer securityThesis