Encryption and decryption use the same key
Encryption and decryption do not use the same key but use the same key.A pairKey: Public key and private key
Both public and private keys can be encrypted and decrypted. As long as the encryption and decryption is a pair of keys, we can see the system requirements of system docking.
Sender: Encrypt with other people’s public key and sign with their own private key
Receiver: Decrypt with its own private key and sign with others’public key