Browse thousands of cybersecurity terms and definitions in our digital security glossary. This cybersecurity dictionary has definitions, examples, terms, and further reading.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

A

Abandonware Accelerated Mobile Pages Acceptable Use Policy Access Control Entry Access Layer Access Point Name Account Compromise Account Hijacking Account Takeover Activation Code Active Attack Active Defense Adaptive Authentication Address Space Address Space Layout Randomization (ASLR) Administrative Privileges Advanced Penetration Testing Advanced Threat Detection AES Encryption Alert Fatigue Allowlisting Alphanumeric Password Analog Computer Angler Phishing Anomaly-based Detection Anonymous Call Rejection Anti-malware Anti-spam Anycast DNS Apple Filling Protocol (AFP) AppleTalk Data Stream Protocol (ADSP) Application Acceleration Application Allow-listing Application Base Application Clustering Application Delivery Controller (ADC) Application Deployment Application Gateway Application Infrastructure Provider (AIP) Application Log Application Programming Interface (API) Application Service Provider (ASP) Application Streaming Application-Aware Networking Arbitrary Code Execution (ACE) Area Border Router (ABR) ARM Processor Artificial Intelligence (AI) Asynchronous Transfer Mode (ATM) ATM Jackpotting Atomicity, Consistency, Isolation, Durability (ACID) Attack Surface Attack Taxonomy Attribute-based Encryption (ABE) Audit Log Augmented Intelligence Authorized Push Payment Fraud Automatic Private IP Addressing Autonomous Intelligence Autorun Worm

B

Back-hack Backdoor Backhaul Backout Plan Backtracking Backup (n.) Backup As a Service BACnet BadUSB Baiting

C

Cache Coherence Cache Invalidation Cache Server Caesar Encryption Call Stack Campus Area Network Canonical Data Model Canonical Name CAPTCHA Captive Portal Card Purchase Authorization Cybersecurity Supply Chain Risk Management (C-SCRM)

D

Dangling Pointer Dark Patterns Dark Web DarkHotel Data Access Data Administration Data Analytics Data Asset Data Audit Data Backup Data Bank Data Binding Data Breach Prevention

E

Eavesdropping Edge AI Edge Datacenter Edge Network Egosurfing Elastic IP Address Electronic Data Interchange Electronic Intelligence Electronic Pickpocketing Electronic Signature Electronically Stored Information

F

Face ID Facial Recognition Failback Fake Antivirus False Flag Fast Flux Fatal Error Fault Configuration Accounting Performance Security Fault Tolerance FCFS FCIP Fiber Channel over Ethernet

G

Garlic Routing GDPR Generative AI Generic Routing Encapsulation Geofencing GHOST Bug Ghostware Gigabit Interface Converter Global Area Network Global Catalog Global File System Globbing

H

Hackintosh Half Duplex Hamming Code Handshake Protocol Hard Reboot Hardening Hardware as a Service Hardware Virtualization Hash Function Hashing Heap Spray HermeticWiper Heuristic Virus High Anonymity Proxy

I

I/O Controller IAST Ice Phishing Identity Cloning Identity Life Cycle Identity Proofing IEEE 802 Image Recognition IMEI Integrated Development Environment IPv4 IPv6

J

Jackware  Jailbreaking Jamming Java Card Java Virtual Machine Jitter JSON Hijacking JSONP Injection Juice Jacking Jump Server Just Enough Operating System

K

Keepalive Kerberos Kerckhoffs’ Principle Kernel-based Virtual Machine (KVM) Key Based Routing Key Distribution Center Key Escrow Key Fob Key Risk Indicator Key Schedule Key-Policy Attribute-Based Encryption Keychain

L

L1 Cache L2 Cache Label Edge Router LAN Party Lateral Movement Layer 2 Forwarding (L2F) Protocol Leaf-spine Architecture Leased Line Least Privilege Access Least Significant Bit Lights Out Data Centre

M

MAC Address Machine Data Machine to Machine Macro Virus Magecart Malicious Active Content Malleability Malware as a service Malware Obfuscation Malware Sandboxing Managed Data Center

N

N-tier Architecture Nano Kernel NAS NAT Traversal Nearline Storage Net Neutrality NetBIOS Netflow Netmask NetSecOps Netwalker Ransomware

O

OAuth Object Request Broker OCSP Stapling Offensive Security On-premises Software One-time Pad (OTP) One-way Encryption Online Certificate Status Protocol (OCSP) Open Port Open Relay Open System OpenPGP

P

Packet Capture Packet Filtering Packet Monkey Packet Switching Pagejacking Parallel Processing Parental Controls Pass the Hash Passive Attack Private IP Public IP

Q

Qbot QR Code Phishing QuadRooter Quality of Service Quality of Storage Service Quantum Cryptography Quantum Error Correction Quantum Hacking Quantum Key Distribution Queries-per-second Query String

R

Race Condition RAID 0 RAID 1 RAID 2 RAID 3 RAID 4 RAID 5 Rain Fencer Cipher Rainbow Table Attack RAM Scraping Random Forest

S

S/Key Salami Fraud Sandbox Escape SCA Scanning Scam Scareware Scatternet Screened Subnet Firewall Scripting Language Scunthorpe Problem

T

T3 Line Tabnabbing Tampering Attack Tarpitting TCP Reset Attack Teardrop Attack Technical Debt Telnet Temporary File Terminal Adapter Terminal Master Key

U

U2F Unicast Address Unified Storage Uniform Resource Name Unix Box Unix-to-Unix Copy Unknown Host Unlabeled Data UPnP URL Filtering User and Entity Behavior Analytics (UEBA)

V

V2Ray Protocol Van Eck Phreaking vCPE Vehicle-to-Infrastructure Velocity Checks Vendor Email Compromise VeriChip Vertical Cloud Virtual Address Virtual Data Room Virtual Dedicated Server Visitor-based Networking

W

Wabbit Walled Garden WAN Aggregation Wangiri Fraud War Texting Wardialing Warshipping Wearable Computer Web Authorization Management (WAM) Web Cache Poisoning Web Content Filtering

X

X.509 XDR Xinetd XML Bomb XML External Entity XML Injection XPath Injection XSS

Y

Yak Shaving Yellow Hat Hacker Ysoserial YubiKey

Z

Zero Client Zero Day Zero-Click Attack Zero-configuration Networking Zero-knowledge Zero-Latency Enterprise Zeus Virus Zip Bomb Zombie Computer Zombie Cookies Zone Information Protocol

0-9

128-bit Encryption 2-Tier Architecture 256-Bit Encryption 3-Tier Architecture 3-way Handshake 5G Network