What is a Certification Authority (CA)?
When GeoTrust issues an SSL Certificate, they act as a Certificate Authority (CA). GeoTrust digitally signs each certificate we issue. Each browser contains a list of CAs to be trusted. When the SSL handshake occurs, the browser verifies that the server certificate was issued by a trusted CA. If the CA is not trusted, a warning will appear. When high-security browsers recognize an Extended Validation SSL Certificate, they display the name of the CA next to the browser bar. GeoTrust is one of the most trusted CAs on the Internet.
When VeriSign issues an SSL Certificate, we act as a Certificate Authority (CA). VeriSign digitally signs each certificate we issue. Each browser contains a list of CAs to be trusted. When the SSL handshake occurs, the browser verifies that the server certificate was issued by a trusted CA. If the CA is not trusted, a warning will appear. When high-security browsers recognise an Extended Validation SSL Certificate, they sometimes display the name of the CA as well as the name of the Certificate owner. Because VeriSign is the most trusted and recognised CA on the Internet (see VeriSign Secured Seal Research Review (PDF)), the presence of the VeriSign name can lend an additional level of trust for site visitors. The VeriSign Trial Root CA is for testing purposes only and is not registered in any browser’s trust list.
When VeriSign issues an SSL Certificate, we act as a Certificate Authority (CA). VeriSign digitally signs each certificate we issue. Each browser contains a list of CAs to be trusted. When the SSL handshake occurs, the browser verifies that the server certificate was issued by a trusted CA. If the CA is not trusted, a warning will appear. When high-security browsers recognize an Extended Validation SSL Certificate, they sometimes display the name of the CA as well as the name of the Certificate owner. Because VeriSign is the most trusted and recognized CA on the Internet (see VeriSign Secured Seal Research Review (PDF)), the presence of the VeriSign name can lend an additional level of trust for site visitors. The VeriSign Trial Root CA is for testing purposes only and is not registered in any browser’s trust list.
The Certification Authority is a trusted authority that implements procedures to verify the identity of an applicant registering for a digital certificate and issues digital certificates that can then be used for accessing the CERT Knowledgebase. The CA also has the ability to revoke the certificate under the terms of its Certificate Policy.
When Comodo issues an SSL certificate, they act as a Certificate Authority (CA). Each browser contains a list of trusted CAs. When the SSL handshake occurs, the browser verifies that the server certificate was issued by a trusted CA. If the CA is not trusted, a warning pops up in the browser. When high-security browsers recognize an Extended Validation SSL certificate, they display the name of the CA next to the browser bar. Comodo is one of the most trusted CAs on the Internet.
