Security Glossary

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A running glossary of cybersecurity terms, concepts, and acronyms explained clearly for IT professionals and security practitioners. Definitions span identity, authentication, endpoint, network, cloud, and threat intelligence — written to cut through jargon and connect terminology to how each concept is used in real security programs.

Cybersecurity

Essential Cybersecurity Definitions Every IT Professional Should Know

Cybersecurity has its own language — and fluency matters for both practitioners and decision-makers. This glossary covers essential definitions from foundational concepts like threat and vulnerability to advanced terms like lateral movement, zero-day, and supply chain compromise.

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