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Securing Digital Services in Bangladesh: A Decentral-ized Identity Verification Framework using Blockchain and Cryptography

by Md Sakibul Islam Sheikh, Md Dipu, Maksudur Rahmand, Kazi Riadul Islam, Naeem Shahriar, Md Mahedi Hasan, Md Zahurul Haque
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 187 - Number 113
Year of Publication: 2026
Authors: Md Sakibul Islam Sheikh, Md Dipu, Maksudur Rahmand, Kazi Riadul Islam, Naeem Shahriar, Md Mahedi Hasan, Md Zahurul Haque
10.5120/ijca0f4ec711233c

Md Sakibul Islam Sheikh, Md Dipu, Maksudur Rahmand, Kazi Riadul Islam, Naeem Shahriar, Md Mahedi Hasan, Md Zahurul Haque . Securing Digital Services in Bangladesh: A Decentral-ized Identity Verification Framework using Blockchain and Cryptography. International Journal of Computer Applications. 187, 113 ( Jun 2026), 18-27. DOI=10.5120/ijca0f4ec711233c

@article{ 10.5120/ijca0f4ec711233c,
author = { Md Sakibul Islam Sheikh, Md Dipu, Maksudur Rahmand, Kazi Riadul Islam, Naeem Shahriar, Md Mahedi Hasan, Md Zahurul Haque },
title = { Securing Digital Services in Bangladesh: A Decentral-ized Identity Verification Framework using Blockchain and Cryptography },
journal = { International Journal of Computer Applications },
issue_date = { Jun 2026 },
volume = { 187 },
number = { 113 },
month = { Jun },
year = { 2026 },
issn = { 0975-8887 },
pages = { 18-27 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume187/number113/securing-digital-services-in-bangladesh-a-decentralized-identity-verification-framework-using-blockchain-and-cryptography/ },
doi = { 10.5120/ijca0f4ec711233c },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2026-06-25T02:45:00.293895+05:30
%A Md Sakibul Islam Sheikh
%A Md Dipu
%A Maksudur Rahmand
%A Kazi Riadul Islam
%A Naeem Shahriar
%A Md Mahedi Hasan
%A Md Zahurul Haque
%T Securing Digital Services in Bangladesh: A Decentral-ized Identity Verification Framework using Blockchain and Cryptography
%J International Journal of Computer Applications
%@ 0975-8887
%V 187
%N 113
%P 18-27
%D 2026
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In today’s digital environment, secure and trustworthy identity management is critical as centralized systems remain vulnerable to data breaches, identity theft, and unauthorized access. This paper presents a blockchain-based decentralized identity verifi-cation framework that enhances data security, privacy, and user control by eliminating reliance on centralized authorities. The proposed system integrates smart contracts, decentralized iden-tifiers (DIDs), and cryptographic security to enable tamper-resistant and transparent identity verification. Sensitive user documents are encrypted using AES-256-GCM and stored off-chain on IPFS, while only cryptographic hashes and verifica-tion records are recorded on the blockchain to preserve privacy and data integrity. Key management is strengthened through HKDF-based derivation, and users can selectively disclose identity attributes using privacy-preserving techniques. Experi-mental analysis indicates that the system significantly reduces identity fraud, improves verification accuracy, and enhances auditability and scalability. The solution is well-suited for appli-cations in finance, healthcare, e-governance, and secure third-party authentication platforms.

References
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Index Terms

Computer Science
Information Sciences

Keywords

Blockchain; Decentralized Identity; IPFS; Smart Contracts; AES-256-GCM; Zero-Knowledge Proofs; Identity Verification; Cryptography

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