Public Key (Encrypt) + Private Key (Decrypt) = Confidentiality
Private Key (Encrypt) + Public Key (Decrypt) = Authentication
Hash Operation = Integrity
QuickHash software
Some examples of Certificate Authorities are IdenTrust, DigiCert, Sectigo, GlobalSign, and GoDaddy. These CAs charge for their services. Let’s Encrypt is a non-profit CA that offers certificates free of charge.
