How encryption with asymmetric keys works?

Question

I understand that:
1. A pair public/private key is used
2. Public key can be shared publicly, but private one is never shared
3. Something encrypted with the private key can only be decrypted with the respective public key and vice-and-versa
4. Private key can be used to confirm authenticity of the message

The thing I don’t understand is how it allows a secure communication between to parties, since anyone with the public key can decrypt at least one side of the communication (i.e. the messages encrypted with the private key).

In: Technology

Answer 1

You don’t send secret messages encrypted with your private key. You ask the receiver if the message for his public key and use that key to communicate with him.