Certification authority uses public key infrastructure to create digital certificates containing public keys for use in the online environment. There is always a pair of digital certificates generated by the CA. One contains the public key, and the other contains the private key. It is vital that you do not get the two digital certificates mixed up, as the private key is not meant to be publically distributed.
You Always Keep the Private Key Created by a Certification Authority
You should always keep the private key created in a digital certificate by a certification authority, as your own digital certificate. You will not distribute this digital certificate, but instead, place it onto your computer. Your private key is used to digitally encrypt data you send out to others online. The private key is also used to authenticate users who send you data using the public key, contained in the digital certificate you provided them.