A month or so ago, whenever I logged on to my bank to pay bills online, a notice saying that a Certificate Authority had expired popped up. It referred to VeriSign as the issuer of the certificate.

The software used by a certification authority (CA) to issue digital certificates. See CA and PKI. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

An SSL certificate is an essential element of running an online business. Online security is a primary concern—both for consumers and for ecommerce business owners. Merchants who want to conduct ...

Certificates confirm not only that the server is presenting the website you wanted to visit, but also that a certificate authority has confirmed that the company or organization behind the site is ...

Patrick Lambert looks at certificate authority hacks like the most recent DigiNotar exploit and suggests several ways to protect your organization from compromised CAs. Over the last couple of weeks, ...

Vincent Danen shows you how to add a Certificate Authority's root certificate on an OS X system, allowing any OS X service that uses SSL and the OS X keychain to trust any certificates issued by the ...

Google has launched its own root Certificate Authority (CA), which will allow the company to issue digital certificates for its own products and not have to depend on third-party CAs in its quest to ...

Disable the Go Daddy Class 2 certificate installed in your computer's Trusted Certificate Store if the certificate is invalid or has been revoked. If a Class 2 Certification Authority certificate ...