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Cybersecurity glossary

Browse thousands of cybersecurity definitions

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A

Acceptable use policy
Access control entry
Access layer
Access management
Access Point Name
Account hijacking
Activation code
Active attack
Active defense
Administrative privileges
Advanced evasion technique
Advanced metering infrastructure
Advanced persistent threat
Adware
AFTS
Air gap
Analog computer
Angler phishing
Anna Kournikova virus
Anonymizer
Anonymous hackers
Anti-malware
Anti-phishing service
Anti-spam
Anti-spyware
Anti-Virus Scanner
Antivirus
Application allow-listing
Application awareness
Application firewall
Application gateway
Application layer
Application Management
Area border router
Artificial intelligence
Assembler
Asynchronous Transfer Mode
Augmented intelligence
Authentication server
Autonomous intelligence

B

Backdoor
Backup
Baiting
Bak file
Banker trojan
Bare metal provisioning
Baseboard management controller
Baselining
Bastion host
Beaconing
Biometric authentication
Biometric data
Biometric device
Biometric security
BIOS rootkit
BitLocker
Black hat hacker
Bladabindi
Bloatware
Blockchain technology
Blue hat hacker
BlueBorne
Bluebugging
Bluejacking
Bluesnarfing
Bluetooth
Booter
Bootkit
Botnet
Broadcast address
Broken access control
Broken authentication attack
Browser hijacker
Brute-force attack
Buffer overflow attack
Bullet camera
Business email compromise

C

Canonical name
Catfishing
CCTV
Cerber ransomware
Certificate authority server
CGNAT
Char
Ciphertext
Circuit-level gateway
Cisco IOS
Class A IP address
Class B IP address
Class C IP address
Class D IP address
Class E IP address
Clean install
Clickjacking
Clicktivism
Client
Cloaking
Cloud operating system
CLSID
Cluster analysis
Co-location
Code injection
Code monkey
Cold boot
Cold data
Computer network defense
Computer network operations
Computer virus
Computer worm
Conficker
Configuration file
Connection-oriented protocol
Consumer electronics
Control framework
Control network
Control unit
Cookie theft
Copy protection
Country code top-level domain
Covert channel
Cracker
Credential stuffing
Credentials
Creeper virus
Critical infrastructure and key resources
Cross-platform
Cryptanalysis
Cryptographic key
Cryptolocker ransomware
CSCW
CSIRT
Customer edge router
CVE
CVSS
Cyber espionage
Cyber harassment
Cyber vandalism
Cyber warfare
Cyberattack
Cyberbullying
Cybercrime
Cybercriminal
Cyberlibel
Cyberlocker
Cyberspace
Cybersquatting
Cyberstalking
Cyberterrorism
Cyberthreat
Cyberwarrior

D

Dark web
Data backup
Data breach
Data bus
Data center rack
Data conversion
Data corruption
Data diddling
Data exfiltration
Data flow model
Data in motion
Data key
Data link layer
Data logging
Data marketplace
Data mining
Data packet
Data profiling
Data protection policy
Data segregation
Data transmission
Data vaulting
Database replication
Datagram
DD-WRT
Decryption
Dedicated IP
Dedicated server
Default gateway
Deobfuscate
Deprecation
DFIR
DHCP
Dictionary attack
Digital dystopia
Digital envelope
Digital fingerprint
Digital footprint
Digital identity
Digital information
Digital switch
Digital watermarking
Discretionary Access Control
Disk defragmentation
DNS cache
DNS filtering
DNS flushing
DNS hijacking
DNS over HTTPS
DNS port
DNS query
DNS record
DNS redirection
DNS resolution
DNS sinkhole
DNS TTL
Domain
Domain admin
Domain controller
Doxxing
DRM-free
Droppper
DSLAM
Dual homed host
Dynamic DNS
Dynamic IP
Dynamic library

E

Eavesdropping
Electronic intelligence
Electronic signature
Email bomb
Email hoax
Email signature
Email spoofing
Embedded software
Emission security
Emoticon
Emulator
Encoding
Encrypted file transfer
End-to-end encryption
Endpoint device
Endpoint security
Error correction code
Error detection and correction
Ethical hacking
Even parity
Event log
Evil twin
Exit node
Exploit
Extranet

F

Facebook stalking
False flag
FCFS
Fiber Distributed Data Interface
Fiber to the Node
File allocation table
File hash
File signature
Fileless malware
FileRepMalware
Firesheep
Firewall
Firmware
First-party cookie
Flash cookies
Flat file
Flooder
Flooding
Footprinting
FOSS
Four-way handshake
FPS
Fragment overlap attack
Freedom of information
Fullz
Fuzz testing

G

Gamification
Gateway server
GDPR
Generic routing encapsulation
Geotagging
GHOST bug
Globbing
Gnosticplayers
Golden ticket attack
Google dorking
Gopher
Government surveillance
Granularity
Graphical user interface
Gray hat hacker
Green hat hacker
Greyware

H

Hackathon
Hackintosh
Hacktivism
Hard reboot
Hard reset
Hardening
Hardware identification
Hash chain
Headless system
Heuristic virus
Hoax
Home server
Honeypot
Host virtual machine
Host-based firewall
Hostname
Hot site
Hot spare
HTML tag
HTTP
HTTP header
HTTP proxy
Hybrid computer
Hyperlink

I

I2P
Image spam
Indicators of compromise
Inference attack
Information hiding
Information processing
Infotainment
Initialization vector
Input validation attack
Installcore
Integrated circuit
Integrated drive electronics
Integrated service digital network
Integrity checking
Intel Virtualization Technology
Intelligent character recognition
Interconnection agreement
Internet backbone
Internet of Everything
Internet of Medical Things
Internet routing
Internet security
Internet telephony
Internet troll
Internet worm
IoT botnet
IoT middleware
IP address blocking
IP Camera
IP SLA
IP surveillance
ISP
Iterative DNS query
ITSM

J

Jailbreaking
Jammer
Jamming
Jank
Juice jacking
Jumbo frame
Jump server

K

Kernel
Key escrow
Key fob
Key risk indicator
Keychain
Keylogger
Keypunch machine
Killware
Kovter

L

LAN party
Lateral movement
Leaf-spine architecture
Leased line
Least privilege
Least Significant Bit
Local area connection
Localhost
Log
Log4Shell
Logic bomb
Logical access
Logical network
Logical topology
Low latency
Lurking

M

MAC address
Machine data
Machine learning
Magnet link
Mail exchange record
Main distribution frame
Malicious code
Malvertising
MAM
MAN
Man trap
Man-in-the-middle attack
Managed file transfer
Managed service provider platform
Management information base
Media access unit
Memory allocation
Memory dump
Mesh node
Message switching
MetaMask
Micro virtual machine
MiFi
Mobile code
Mobile network operator
Monitoring software
Monte Carlo simulation
Moves adds and changes
MPLS
Muling
Mutual exclusion

N

NAS
NAT traversal
Net neutrality
Netiquette
Network access control
Network bottleneck
Network convergence
Network encryption
Network frame
Network ID
Network information system
Network intrusion protection system
Network layer
Network port
Network security protocols
Network service provider
Nmap
Node
Nord name
Northbound interface southbound interface
Not-a-virus
Nuker
Null session

O

Obfuscation
Odd parity
Offensive security
One-time password
Onion domain
Operational level agreement
Operational technology
OPSEC
Optical line terminal
OSI layer

P

Packet capture
Packet coalescing
Packet filtering
Packet sniffing
Parity check
Passive surveillance
Passphrase
Password protection
Password salting
Password sniffer
Password spraying
Password vault
Patch
Payload
Peering
Perimeter security
Peripheral device
Permalink
Persistent cookie
Personal firewall
Personal VPN
PGP Encryption
Pharming
PHP injection
Phreaking
Physical layer
Piggybacking
Ping
Ping of death
Platform security
Polymorphic virus
Port address translation
Port knocking
Portable computer
Post-quantum cryptography
Potentially unwanted application
Power usage effectiveness
PPPoE
Presentation layer
Pretexting
Privacy policy
Private IP
Promiscuous mode
Proprietary software
Pseudonym
Pseudonymization
PsExec
Public domain software
Public IP
PvE
PvP
PWN

Q

QR code phishing
QuadRooter
Quantum cryptography
Quantum key distribution
Quid pro quo attack

R

Rainbow table attack
Red hat hacker
RedHack
Relay server
Remote access server
Remote access trojan
Remote attack
Remote desktop
Repeater
Replay attack
Request for Comments
Resident virus
Reverse brute-force attack
Reverse DNS
REvil ransomware
RFC1918
RFID blocking
RFID tag
Rich internet application
Ring network
Riskware
Rogue access point
Rooting
Routing table
RPG
Ryuk ransomware

S

Salting
Sandbox gaming
Sandboxing
Scam
Screened subnet firewall
Script Kiddie
Secret key
Secure coding
Secure connection
Secure cookie
Secure Print
Secure Shell
Security certificate
Security event management
Security identifier
Security policy
Security software
Security token
Self-destructing email
Sensitive information
Server Message Block
Session cookie
Session fixation attack
Session hijacking
Session layer
Sextortion
SFTP server
Shared IP
Shared storage
Shoulder surfing
Sidejacking
Sideloading
Signature verification
Skimming attack
Smart bulb
Smart grid
Smart meter
SMIME
Smishing
Smurfing
Social engineering
Soft copy
Softlifting
Software package
Software piracy
Software repository
Source code
Spambot
Spamming
Spear phishing
Split DNS
Spooling
Spyware
SQL injection
SQL injection scanner
SQL injection tool
SSID
SSL Encryption
Stack smashing
Staging server
Stalkerware
Static IP
Static NAT
Static routing
Stealth virus
Subnet
Super cookie
Superkey
Svchost.exe
Synchronization
Synthetic identity theft
Sysmon
System file

T

Taint analysis
Tarpitting
TCP handshake
TEMPEST shielding
Tethering
Text data mining
Third-party cookie
Thrashing
Threat actor
Threat hunting
Threat vector
Thumb drive
Tiger team
Time division duplex
Time-division multiplexing
Token ring
Top-down design
Tracking cookie
Tracking pixel
Transcoding
TRANSEC
Transmitter
Transparent proxy
Transponder
Transport layer
TrickBot
Triple DES
Trojan
Tunneling
Two-factor authentication
Two-phase commit
Typosquatting

U

UEBA
Unauthorized access
Unified computing system
Unlabeled data
UPnP
URL injection
Usenet
Username

V

V2Ray protocol
Vanity domain
VCPE
Vehicle-to-Infrastructure
Verichip
Virtual address
Virtual desktop infrastructure
Virtual firewall
Virtual host
Virtual switch
Vishing
VLAN tagging
VM escaping
VoIP
VPN firewall
VPN gateway
VPN Token
Vulnerability
Vulnerability assessment
Vulnerability management system

W

WAN
WAN aggregation
WAN port
Warchalking
Wardialing
Watering hole attack
Web server security
Webpage
Website defacement
Website spoofing
Whaling
White hat hacker
Whitelisting
Wildcard certificate
Windows deployment services
Wireguard
Wireless fidelity
Wireless network security
WMN network
Workstation
WPAN

X

XDR
XML bomb
XML external entity
XSS

Y

Yak shaving
Yellow hat hacker
Ysoserial
YubiKey

Z

Zero day
Zero trust
Zero-click attack
Zero-knowledge
Zeus virus
Zip bomb
Zombie computer

0-9

128-Bit Encryption
2-tier architecture
3-way handshake

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