PKI Tutorials - Herong's Tutorial Examples - v2.32, by Herong Yang
Most Popular Certificate Authorities
This section provides a list of most popular certificate authorities.
Based on the Website monitoring report provided w3techs.com, top 12 CA (Certificate Authorities) in 2018 are:
CA Share IdenTrust 45.5% Comodo 31.3% DigiCert Group 11.0% GoDaddy Group 6.9% GlobalSign 3.1% Certum 0.8% Actalis 0.4% Entrust 0.3% Secom Trust 0.3% Let's Encrypt 0.2% Trustwave 0.1% WISeKey Group 0.1%
Based on a research report from netcraft.com, top 30 certificate authorities in 2009 were:
Share Group Certificate Authority 21.17% Go Daddy GoDaddy.com, Inc. 12.79% VeriSign Equifax Secure Inc. 11.19% VeriSign Thawte Consulting cc 10.58% Comodo UTN-USERFirst-Hardware 8.23% VeriSign VeriSign, Inc. 7.80% VeriSign Equifax 6.38% VeriSign VeriSign Trust Network 3.37% Comodo Comodo CA Limited 2.55% Network Solutions Network Solutions L.L.C. 2.25% Go Daddy Starfield Technologies, Inc. 1.57% DigiCert Inc 1.33% Entrust.net Entrust.net 1.24% GlobalSign GlobalSign nv-sa 0.67% Cybertrust 0.63% AmbironTrustWave SecureTrust Corporation 0.60% VeriSign Thawte Consulting (Pty) Ltd. 0.56% Root CA 0.55% IPS Certification Authority s.l. 0.47% Comodo Secure Business Services, Inc. 0.42% VeriSign RSA Data Security, Inc. 0.34% Betrusted Japan Co., Ltd. 0.33% StartCom Ltd. 0.30% SECOM Trust.net 0.27% GlobalSign Alpha 0.25% GlobalSign GlobalSign 0.24% TC TrustCenter for Security in Data ... 0.23% CAcert Inc. 0.20% Comodo Comodo Limited 0.19% T-Systems Enterprise Services GmbH 0.19% U.S. Government .... 3.11% (Others)
Table of Contents
►Introduction of PKI (Public Key Infrastructure)
What Is PKI (Public Key Infrastructure)
Usage Examples of Public Key Infrastructure
►Most Popular Certificate Authorities
Introduction of HTTPS (Hypertext Transfer Protocol Secure)
Using HTTPS with Google Chrome
Using HTTPS with Mozilla Firefox
HTTPS with IE (Internet Explorer)
Android and Server Certificate
Windows Certificate Stores and Console
RDP (Remote Desktop Protocol) and Server Certificate
macOS Certificate Stores and Keychain Access
Perl Scripts Communicating with HTTPS Servers
PHP Scripts Communicating with HTTPS Servers
Java Programs Communicating with HTTPS Servers
.NET Programs Communicating with HTTPS Servers
CAcert.org - Root CA Offering Free Certificates
PKI CA Administration - Issuing Certificates
Comodo Free Personal Certificate
Digital Signature - Microsoft Word
Digital Signature - OpenOffice.org 3