● The Encyclopedia of Cybersecurity

The Cybersecurity Glossary

Clear, accurate definitions for every cybersecurity term — from APT to Zero-Day.

Entries: 1409
Languages: 8
Categories: 17
License: Open

Entry № 001 · ● Attacks & Threats

Phishing

A social-engineering attack in which an attacker impersonates a trusted party to trick a victim into revealing credentials, transferring money, or running malware.

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vulnerabilities№ 001
Zero-Day Vulnerability
A security flaw that is unknown to the vendor (or for which no patch yet exists) at the moment it is discovered or exploited.
malware№ 002
Ransomware
Malware that encrypts a victim's data or locks systems and demands payment in exchange for restoring access.
ai-security№ 003
Prompt Injection
An attack that overrides an LLM's original instructions by smuggling adversarial text into the prompt, causing the model to ignore safeguards or execute attacker-chosen actions.
defense-ops№ 004
SIEM
A platform that aggregates, normalizes and correlates security telemetry from across the enterprise to enable detection, investigation, compliance and reporting.
network-security№ 005
Zero Trust Network
A network architecture that never trusts users, devices, or services by default and enforces continuous, identity-aware verification of every connection.
vulnerabilities№ 006
Log4Shell (CVE-2021-44228)
A critical December 2021 remote code execution vulnerability in Apache Log4j 2 that allowed attackers to run arbitrary code by logging a single JNDI lookup string.
ai-security№ 007
Deepfake
Synthetic audio, image, or video media generated by AI to convincingly depict a real person saying or doing something they did not.

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Phishing

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Zero-Day Vulnerability

Ransomware

Prompt Injection

SIEM

Zero Trust Network

Log4Shell (CVE-2021-44228)

Deepfake

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