Cybersecurity Glossary
Explore our comprehensive repository of cybersecurity terminology. From OSINT fundamentals to cryptographic protocols, master the vocabulary of modern threat intelligence and network defense.
ASN
Learn what an Autonomous System Number is, how BGP routing relies on ASNs, and how security researchers use ASNs to map threat infrastructure.
DKIM
Understand how DKIM uses public key cryptography to digitally sign emails, ensuring they haven't been tampered with in transit.
DMARC
Discover how DMARC ties SPF and DKIM together, provides reporting, and allows organizations to definitively block phishing attacks.
DNS
Learn how the Domain Name System (DNS) works, common DNS vulnerabilities, record types, and how to perform DNS reconnaissance.
OSINT
A comprehensive guide to Open Source Intelligence (OSINT), detailing methodologies, frameworks, and tools used by hackers and defenders to map digital attack surfaces.
SPF
Learn how SPF (Sender Policy Framework) protects your domain from email spoofing, how to format SPF records, and how to troubleshoot common SPF failures.
SSL
Understand the history of SSL, why it was deprecated, how X.509 digital certificates work, and how to manage cryptographic trust chains.
TLS
A deep dive into Transport Layer Security (TLS), handshake protocols, ciphers, and why modern web security requires TLS 1.2 and TLS 1.3.
WHOIS
A comprehensive guide to WHOIS lookups, domain registration data, privacy protections, and how cybersecurity professionals use WHOIS for threat intelligence.