Final answer:
Public Key Exchange (PKE), Diffie-Hellman (DH), and Elliptic Curve Diffie-Hellman (ECDH) are public key systems that generate different random public keys for each session.
Step-by-step explanation:
The public key systems that generate different random public keys for each session are:
Public Key Exchange (PKE)
Diffie-Hellman (DH)
Elliptic Curve Diffie-Hellman (ECDH)
These key exchange protocols allow two entities to securely communicate and agree on a shared secret key without an eavesdropper being able to determine the shared secret. Each session between the entities generates a unique pair of public and private keys, ensuring the confidentiality and integrity of the communication.