A PKI certificate can refer to a digital certificate containing a public key or a private key. Depending on the actual type of certificate, it will determine whether it can be shared with multiple people, or held solely by the user. The information contained in the certificate will follow a set standard and include basic information, such as the date, certificate issuer and validity period.
A PKI Certificate Can Be Set to Expire After a Period of Time
You can set up a PKI certificate so that it will automatically expire after a period of time. The length of time the certificate is valid for is entirely up to you. Most certificates are valid for a long period of time, such as several months, or even years. Some organizations will issue one-time use certificates, which mean once they are used, they expire and cannot be used again.