Public key cryptography is a process used by a certificate authority system to create digital certificates for public distribution. There are all types of certificates in use, which help to create secure connections over the internet. It is normal for common types of public certificates to be preinstalled on new computers by the manufacturer, or contained within the operating system. In addition to these types, you can also obtain certificates directly from various businesses, such as your bank or credit union.
Public Key Cryptography Allows You to Set Expiration Dates
You can control when digital certificates expire, including certificates made using public key cryptography. Once a certificate expires, it will no longer provide access to resources associated with the certificate. Organizations which want to continue using the same certificates, can always update the expiration dates. Whenever a user connects, their certificate can be updated to reflect the new expiration date, using various distribution methods, including issuing a new certificate.