---
title: "Critical Information Infrastructure (CII): Meaning"
description: "Critical Information Infrastructure (CII) includes vital computer resources whose destruction can severely impact national security and public safety."
url: "https://modeldiplomat.com/learn/glossary/critical-information-infrastructure"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Critical Information Infrastructure is a computer resource whose incapacitation or destruction would have a debilitating impact on national security, economy, public health, or safety.
- What is the difference between NCIIPC and CERT-In?
- When does Critical Information Infrastructure become a 'protected system'?
- Which sectors does India treat as Critical Information Infrastructure?
- How does CII differ from critical infrastructure generally?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In 2018 the Government of India declared the Unique Identification Authority of India's Aadhaar Central Identities Data Repository a "protected system" under Section 70 of the IT Act, classifying it as Critical Information Infrastructure.

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