Let's say we have the following:
- Bob needs to send data securely to Alice.
- Only Bob and Alice are allowed to read/see that data.
- Alice is not able/allowed to create keys.
- Alice can use any number or type of keys to decrypt data.
- Bob can create and share any number or types of keys
- Bob and Alice can have an initial secure exchange of information.
How would Bob and Alice use PGP or alternative public-key cryptography system to meet their communication needs?