Public key infrastructure (pki) uses asymmetric key encryption between parties. the originator encrypts information using the intended recipient's "public" key in order to get confidentiality of the data being sent. the recipients use their own "private" key to decrypt the information. the "infrastructure" of this methodology ensures that:
a. the sender and recipient have reached a mutual agreement on the encryption key exchange that they will use. b. the channels through which the information flows are secure. c. the recipient’s identity can be positively verified by the sender. d. the sender of the message is the only other person with access to the recipient’s private key.