Certificate Authority (CA)
A Certificate Authority is a trusted organization that issues SSL/TLS certificates to verify a server’s identity.
Security~1 min read
In plain English
A trusted company that issues the “padlock” certificates for websites. Browsers trust CAs so they can show the lock and HTTPS.
A Certificate Authority (CA) is an entity that issues digital certificates used for HTTPS. Browsers and operating systems ship with a list of trusted CAs. When a site presents a certificate signed by a trusted CA, the browser shows the padlock.
Our SSL certificate checker shows which CA issued a site’s certificate and when it expires.