Mohammad Robaitul Islam Bhuiyan1*, Tahmida Wara2 and Simu Sultana1
Abstract: Nowadays many global companies are using blockchain technology for various services as the blockchain technology ensures ledger’s integrity, privacy, and authenticity of transactions without a centralized control entity. This research has focused on using blockchain technology in the National identity number and passport issuing system of Bangladesh. The current identification system is insecure, complex, timeconsuming, and full of middlemen. It has always been the subject of unethical intruders, system downtime, unavoidable system upgrades and license fees, hardware constraints, and network traffic obstructions. Besides, there are still challenges in verifying users’ identity, authenticating and authorizing users. This system will help simplify the process of validating and issuing National Identity (NID) cards and passports along with preventing unauthorized issuance. Once a citizen is added to the chain, he can have his passport number with a simple request without further verification and document submission. A certification authority ensures the authenticity of information in the proposed decentralized network. Algorithms of the smart contract define the access rights of different stakeholders of the network. Proof of Authority (PoA), a suitable consensus algorithm, is used to secure the mining process. Once a block is mined and distributed, the system becomes immune to fraudulent intentions as no information can be deleted or modified. It will also ensure security by decentralizing the database to eliminate unauthorized access and repetitive data verification process with blockchain technology.
Keywords: Blockchain, proof of authority (PoA), decentralized network, miner, consensus algorithm
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