Signisys Knowledge Base
The AI, Cloud & Cybersecurity
Encyclopedia
Your definitive reference for cybersecurity terminology — from foundational concepts to cutting-edge AI-driven threats and defenses.
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2026
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What is AI Security? Risks, Threats, and Enterprise Defense Framework
AI security protects AI systems, models, and data from threats unique to machine learning and generative AI. This guide covers the full risk taxonomy — prompt injections, data poisoning, shadow...
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Category: Showing 119 terms
A
A Terms
Authentication Factors
Authentication factors are the types of proof used to verify your identity — something you know, something you have, and...
Access Control
Access control checks who you are, decides what you can do, and logs what you did. It's the #1 OWASP...
Account Takeover
Account takeover (ATO) is a cyberattack where hackers steal login credentials and gain unauthorized access to user accounts — email,...
Active Directory
Active Directory is a directory service developed by Microsoft for Windows domain networks that provides centralized authentication, authorization, and resource...
Adware
Adware is advertising-supported software that ranges from harmless free-app ads to aggressive malware that hijacks browsers and steals data. This...
Agentic AI
Agentic AI is a new type of artificial intelligence that can reason, plan, and act on its own to reach...
AI Detection and Response
AI detection and response (AIDR) is a new class of security built to protect AI models, prompts, agents, and data...
AI Security
AI security protects AI systems, models, and data from threats unique to machine learning and generative AI. This guide covers...
AI Social Engineering
AI social engineering has collapsed the economics of impersonation — voices cloned from three seconds of audio, deepfake video calls,...
AI-Driven Access Control
AI-driven access control uses machine learning to make live, adaptive access decisions — replacing static rules with smart, context-aware choices....
AIOps
AIOps (Artificial Intelligence for IT Operations) uses machine learning, natural language processing, and analytics to automate IT operations — from...
Advanced Persistent Threat (APT)
An advanced persistent threat is a sustained cyberattack where skilled intruders break into a network and stay hidden for months...
Attack Surface
An attack surface is the total set of entry points where attackers can try to break into your systems. This...
Antivirus
Antivirus finds, blocks, and removes harmful programs from your devices. Over 60,000 new malware samples are created every day. This...
API Security
API security is the practice of keeping APIs safe from attacks, data leaks, and misuse. This guide covers how API...
Application Resiliency
Application resiliency is the ability of software to keep running — or recover fast — when things go wrong. Learn...
Application Security
Application security (AppSec) is the practice of finding, fixing, and blocking security issues in software across its full lifecycle. This...
Artificial Intelligence
Artificial intelligence (AI) is the branch of computer science that builds machines able to perform tasks requiring human intelligence —...
Attack Surface Management
Attack surface management (ASM) is the continuous process of discovering, classifying, prioritizing, and remediating every exposed asset across an organization's...
Attribute-Based Access Control
Attribute-based access control uses attributes — like role, location, device, time, and data type — to make access decisions through...
B
B Terms
Botnet
A botnet is a network of infected devices controlled by a single attacker called a bot herder. This article explains...
Business Email Compromise (BEC)
Business email compromise (BEC) is a targeted email scam where attackers impersonate trusted executives, vendors, or lawyers to trick employees...
C
C Terms
CASB
A CASB (cloud access security broker) sits between users and cloud applications to enforce data security, access control, and threat...
Cloud Computing
New to the cloud, or trying to make sense of IaaS, public versus private, and where the savings actually come...
Cloud Cost Management
Cloud cost management is the operational discipline of tracking, allocating, forecasting, and governing cloud infrastructure spend. This guide walks through...
Cloud Cost Optimization
Most teams discover cloud cost optimization the month a bill stops making sense. This guide cuts through vendor pitches with...
Cloud Detection and Response
Cloud detection and response (CDR) is a cloud-native security approach that provides real-time threat detection, investigation, and automated response across...
Cloud Infrastructure
Cloud infrastructure is the collection of hardware and software — servers, storage, networking equipment, and virtualization — that powers cloud...
Cloud Native
Cloud native is an approach to building and running scalable applications using microservices, containers, service meshes, immutable infrastructure, and DevOps...
Cloud Security
Cloud security is the discipline of protecting data, applications, and infrastructure across cloud environments. This guide covers the shared responsibility...
Cloud Workload Protection Platform
A cloud workload protection platform (CWPP) secures virtual machines, containers, and serverless functions from runtime threats across multi-cloud and hybrid...
CNAPP
CNAPP (cloud native application protection platform) merges cloud posture management, workload protection, access control, data security, and build-time scanning into...
Context-Aware Access Control
Context-aware access control checks real-time signals — like location, device, time, and behavior — before granting or denying every request....
Continuous Authentication
Continuous authentication verifies a user's identity all through the session — not just at login. It uses behavioral biometrics, device...
Continuous Authorization
Continuous authorization checks whether a user should still have access — not just at login, but for every action during...
D
D Terms
F
F Terms
I
I Terms
Indicators of Compromise
Indicators of compromise (IOCs) are forensic clues that a network or system has been breached — suspicious IPs, file hashes,...
IaaS
Renting infrastructure instead of buying it reshaped how businesses scale. This guide explains what IaaS is, grounded in the NIST...
Insider Threat
An insider threat is a security risk from someone with valid access — employees, contractors, or vendors — who misuses...
S
S Terms
V
V Terms
Vector Database
A vector database stores, indexes, and searches data as high-dimensional vectors — numerical representations that capture meaning. This guide covers...
Virtual Private Network (VPN)
A virtual private network (VPN) creates an encrypted connection between your device and a remote server, keeping sensitive data hidden...