Home/Glossary/X.509 Certificate

X.509 Certificate

A digital certificate standard that binds a public key to an identity, enabling encrypted connections and authentication.

PKI & CertificatesAlso called: "digital certificate", "ssl certificate", "tls certificate"

X.509 certificates are the foundation of HTTPS, code signing, and email encryption.

Certificate components

  • Subject: Who the certificate represents (domain, organization).
  • Issuer: The Certificate Authority (CA) that signed it.
  • Public Key: Used for encryption and signature verification.
  • Validity Period: Start and expiration dates.
  • Signature: CA's cryptographic endorsement.

Certificate types

  • DV (Domain Validated): Proves domain ownership only.
  • OV (Organization Validated): Includes company verification.
  • EV (Extended Validation): Highest assurance with legal vetting.

Related Tools

Related Articles

View all articles
📄

DNS Infrastructure Compared: Cloudflare DNS vs Route 53 vs Azure DNS vs Google Cloud DNS

A deep technical comparison of managed DNS services from Cloudflare, AWS Route 53, Azure DNS, and Google Cloud DNS — covering architecture, performance, security, pricing, and strategic implications.

Read article →
📄

Load Balancing Compared: Cloudflare vs AWS ELB vs Azure Front Door vs Google Cloud Load Balancing

A deep technical comparison of load balancing across Cloudflare, AWS Elastic Load Balancing, Azure Front Door, and Google Cloud Load Balancing — covering global vs regional architectures, health checking, SSL termination, and pricing.

Read article →
📄

Developer Experience Compared: Cloudflare vs AWS vs Azure vs Google Cloud

A technical comparison of developer experience across Cloudflare, AWS, Azure, and Google Cloud — CLI tools, local development, deployment speed, documentation, IaC support, console UX, and the day-to-day reality of building on each platform.

Read article →
Threat Modeling with STRIDE and DREAD: A Complete Guide to Proactive Security Architecture

Threat Modeling with STRIDE and DREAD: A Complete Guide to Proactive Security Architecture

Master threat modeling with STRIDE and DREAD frameworks to identify, classify, and prioritize security threats before they become vulnerabilities. This comprehensive guide covers data flow diagrams, mitigation mappings, MITRE ATT&CK integration, and building an enterprise threat modeling program.

Read article →

Explore More PKI & Certificates

View all terms

Certificate Transparency (CT)

A public logging system that records all SSL/TLS certificates, enabling detection of misissued or malicious certificates.

Read more →

Public Key Infrastructure (PKI)

A framework of policies, processes, and technologies for managing digital certificates and public-key encryption.

Read more →
←Back to glossary