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Privacy & Encryption Glossary

Clear definitions of the privacy, encryption, and security terms you encounter when protecting your communications. Browse by category, from cryptography and tracking to authentication, attacks, and privacy law.

Encryption & Cryptography

AES-256 Certificate Authority Certificate Pinning Diffie Hellman Key Exchange Double Ratchet Algorithm Elliptic Curve Cryptography End To End Encryption GPG Key Key Fingerprint Key Transparency Key Verification Noise Protocol Perfect Forward Secrecy PGP Encryption Public Key Infrastructure QR Code Verification RSA Encryption Safety Number Signal Protocol SSL Certificate TLS 1.3 X3DH Protocol Zero Knowledge Proof

Tracking & Surveillance

Browser Fingerprint Canvas Fingerprinting CNAME Cloaking Cookie Cross Site Tracking Device Fingerprinting Dns Leak DNS over HTTPS DNS over TLS DNSSEC Evercookie First Party Tracking IP Address IPv6 Leak Link Decoration Local Storage Tracking MAC Address Metadata Metadata Resistance Onion Routing Proxy Server Sealed Sender SOCKS5 Proxy Supercookie Third Party Tracking Tor Network Tracking Cookie Tracking Pixel VPN Web Beacon WebRTC Leak

Privacy Law & Regulation

CCPA Consent Management COPPA CPRA Data Breach Notification Data Minimization Data Portability Data Processing Agreement Data Protection Act Data Protection Officer Digital Services Act FERPA FISA Court Five Eyes Fourteen Eyes Gag Order GDPR HIPAA LGPD National Security Letter Nine Eyes PIPEDA Privacy Impact Assessment Privacy Policy Purpose Limitation Right To Erasure Terms Of Service Transparency Report Warrant Canary

Authentication & Access Control

Argon2 bcrypt Biometric Authentication Containerization Defense In Depth Face ID FIDO2 Hardware Security Key HOTP Least Privilege Principle Multi Factor Authentication Passkey Password Hashing PIN Code Salt And Pepper Sandbox TOTP Touch ID Two Factor Authentication WebAuthn YubiKey Zero Trust Architecture

Security Threats & Attacks

ARP Spoofing Backdoor Baiting Cold Boot Attack Downgrade Attack Evil Maid Attack Evil Twin Attack Keylogger Man In The Middle Attack Phishing Pretexting Ransomware Replay Attack Rootkit Rubber Hose Cryptanalysis Session Hijacking Shoulder Surfing Side Channel Attack Smishing Social Engineering Spear Phishing Spyware Stalkerware Supply Chain Attack Tailgating Timing Attack Vishing Zero Day Exploit

Secure Messaging

Data At Rest Data In Transit Data In Use Disappearing Messages Last Seen Message Retention Online Status Read Receipts Secure Messaging Self Destructing Messages Typing Indicators

Privacy Technology

Air Gap Anonymous Credentials Attack Surface Bitlocker Blockchain Privacy Bug Bounty Code Audit Coinjoin Common Vulnerabilities CVE Decentralized Identity DID Document Differential Privacy Edge Computing Encrypted Container Faraday Cage Federated Learning File Vault Firmware Update Full Disk Encryption Garbled Circuit Homomorphic Encryption LUKS Mixing Service Monero Privacy Oblivious Transfer On Device Processing Open Source Security OPSEC Penetration Testing Privacy Enhancing Technology Private Information Retrieval Reproducible Builds Responsible Disclosure Ring Signature Secret Sharing Secure Boot Secure Multi Party Computation Security Audit Security Patch Selective Disclosure Self Sovereign Identity Stealth Address Threat Model Threshold Cryptography Veracrypt Verifiable Credential Verified Boot Zcash Privacy Zero Knowledge Rollup

Explore Privacy & Messaging Resources

Best Encrypted Apps 2026 Compare Messaging Apps Head-to-Head Comparisons Privacy Guides Privacy Hub

Privacy & Encryption Glossary

Encryption & Cryptography

Tracking & Surveillance

Privacy Law & Regulation

Authentication & Access Control

Security Threats & Attacks

Secure Messaging

Privacy Technology

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