International Journal For Multidisciplinary Research

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Decentralized Trust In 5G: A Blockchain-Driven Zero Trust Security Framework Addressing The Scalability Trilemma

Author(s) Mr. Debjyoti Bagchi, Dr. Pranam Paul, Sreemoyee Pradhan, Md Saad Alam, Arghadeep Naskar
Country India
Abstract The advent of 5G networks has introduced a paradigm shift in communication infrastructure, facilitating ultra-low latency and high-speed data transmission. Despite this, this progress is accompanied by a spike in diverse and sophisticated cyberattacks, for which there is no comprehensive, foolproof defence strategy. In order to address the Scalability Trilemma—achieving decentralization, scalability, and trust—and security concerns, this study proposes a robust security framework that combines blockchain technology with Zero Trust Architecture (ZTA). The proposed framework presents an end-to-end coherent workflow in four successive stages: (i) Access Request Initiation with contextual metadata, (ii) Decentralized identity verification via blockchain-based Decentralised Identifiers (DIDs) and Verifiable Credentials (VCs), (iii) Context-aware Dynamic Access Control enforced through smart contracts, risk scoring, and cryptographic mechanisms such as Zero Knowledge Proofs (ZKPs) and Multi-Factor Authentication (MFA), and (iv) Time-bound, least-privilege access provisioning with continuous session monitoring and immutable logging. The model, which is proposed to be strategically implemented at the 5G network's device (access) layer, affirms real-time enforcement while maintaining accountability, privacy, and verifiability. Our research delivers a fully decentralized, tamper-resistant, and scalable architecture capable of dynamically mitigating advanced cyber threats, while ensuring secure delivery of 5G services across diverse use cases.
Keywords Zero Trust, Scalability Trilemma, Multi-factor Authentication, Decentralization, Blockchain, Sophisticated Threat, Trust Scoring
Field Computer > Network / Security
Published In Volume 8, Issue 2, March-April 2026
Published On 2026-03-25
DOI https://doi.org/10.36948/ijfmr.2026.v08i02.72313
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