PluginSift
PluginsThemesCompare
Directory
  • Plugins
  • Themes
  • Compare Plugins
Plugin Comparisons
  • SEO
  • Security
  • Ecommerce
  • Page Builders
  • Caching
  • Backup
  • Forms
  • Analytics
Resources
  • About
  • Contact
  • llms.txt

© 2026 PluginSift. Data sourced from WordPress.org. · [email protected]

  1. Home
  2. Plugins
  3. Ssl
  4. Client Certificate Authentication
Client Certificate Authentication icon

Client Certificate Authentication

Authenticating with a SSL Client Certificate by using the email address. Optionally, new accounts can be created with the name from the certificate.

By MarioLipinski·Ssl·Free
5(2 reviews)
·10 active installs·Updated 12 years ago
DownloadVisit HomepageCompare

As of April 2026, Client Certificate Authentication is a WordPress ssl plugin with 10 active installations and a 5/5 rating from 2 reviews. It has been downloaded 3.2K+ times in total. Requires WordPress 3.1+ and PHP false+. Available on WordPress.org since 2013. Last updated 12 years ago — may have compatibility concerns. Top alternative: Cloudflare.

5/52 reviews
10active installs
3.2K+total downloads
13 yearssince 2013

Overview

The Client Certificate Authentication plugin enables WordPress to login a user with a SSL client certificate. The plugin uses the email address from the subject field to identify the user by the email address of his wordpress account. Optionally, new accounts can be created on the fly by using email address and name from the certificate. By limiting login and registration to users providing a client certificate, bots are locked out and spam is eliminated.

Acknowledgements: This plugin is based on the HTTP Authentication plugin by Daniel Westermann-Clark. Ideas taken from Dan B.’s implementation for client certificate authentication.

Read full description on WordPress.org

Ratings & Reviews

52 reviews
5 ★
2
4 ★
0
3 ★
0
2 ★
0
1 ★
0

Compatibility

WordPress3.1+ requiredTested up to 3.5.2
PHPfalse+ required

Top Alternatives to Client Certificate Authentication

Cloudflare icon
Cloudflare
3.5200K+ installsUpdated 3 months ago
ViewCompare
Flexible SSL for CloudFlare icon
Flexible SSL for CloudFlare
4.8100K+ installsUpdated 3 months ago
ViewCompare
Easy HTTPS Redirection (SSL) icon
Easy HTTPS Redirection (SSL)
4.2100K+ installsUpdated 1 week ago
ViewCompare
SSL Insecure Content Fixer icon
SSL Insecure Content Fixer
4.8100K+ installsUpdated 3 months ago
ViewCompare
WP Force SSL & HTTPS SSL Redirect icon
WP Force SSL & HTTPS SSL Redirect
4.790K+ installsUpdated 4 months ago
ViewCompare
View all ssl plugins →

Frequently Asked Questions

Changelog

1.0

Initial release.

View full changelog on WordPress.org

Contributors

MarioLipinskiMarioLipinski
Plugin Info
Version
1.0.2
Last Updated
Jul 17, 2013
WP Requires
3.1+
Tested Up To
3.5.2
PHP Requires
false+
Active Installs
10
Downloads
3.2K+
Added
Jul 14, 2013
Business
Free

Tags

sslauthenticationclient certificatessl authenticationclient certificate authentication

Developer

M
MarioLipinski
1 plugins0.0M+ total installs
View all plugins →

Quick Compare

Client Certificate Authentication vs Cloudflare→Client Certificate Authentication vs Flexible SSL for CloudFlare→Client Certificate Authentication vs Easy HTTPS Redirection (SSL)→

Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.