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By: Vaishnavi Gopal Shirsikar, Aditi Dinanath Shahane, and Kazi Kutubuddin Sayyad Liyakat.
1 Assistant Professor, Department of Electronics and Telecommunication, Brahmdevdada Mane Institute of Technology, Solapur, Maharashtra, India
2 Assistant Professor, Department of Electronics and Telecommunication, Brahmdevdada Mane Institute of Technology, Solapur, Maharashtra, India
3 Professor and Head, Department of Electronics and Telecommunication, Brahmdevdada Mane Institute of Technology, Solapur, Maharashtra, India
The contemporary Local Area Network (LAN) is the digital circulatory system of the modern enterprise, a vital yet perilously vulnerable ecosystem. Traditional security paradigms, built upon centralized authority models – firewalls, intrusion detection systems, and privileged administrators – increasingly resemble medieval castles in an age of artillery. They present a brittle single point of failure: compromise the center, and the entire kingdom falls. This paper proposes a radical architectural shift, envisioning the LAN not as a fortress to be defended, but as a consensus-driven organism to be verified. We introduce a novel framework for LAN security leveraging the foundational principles of blockchain technology: decentralization, immutability, and cryptographic auditability. Our methodology involves the implementation of a private, permissioned blockchain overlay atop the existing physical network infrastructure. In this model, every network device – from endpoints and servers to switches and routers – acts as a node participating in a continuous, low-latency consensus mechanism. Core network functions – device authentication, address allocation via DHCP – and access control policy enforcement – are transformed into smart contracts. These self-executing contracts autonomously validate requests against a distributed ledger, ensuring that only authorized, cryptographically-verified entities can join or interact within the network. This eradicates the threat of spoofing, rogue device infiltration, and malicious lateral movement by making every action transparent, contestable, and irrevocably logged. By dismantling the centralized chokepoints of conventional security, we architect a LAN that is not merely protected, but inherently trustworthy by design.
Citation:
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