Secure communication method and smart lock system based thereof

A system comprising:

• a first device configured to:
• generate data to be transmitted;
• determine encrypted data by encrypting the data to be transmitted using an encryption algorithm based on an encryption key, wherein the encryption key is obtained by a key exchange process between the first device and a second device through a preset communication channel;
• assign an identifier for the encrypted data;
• and
• send the encrypted data with the identifier to the second device.

A method comprising:

• generating, by a first device, data to be transmitted;
• determining encrypted data by encrypting, by the first device, the data to be transmitted using an encryption algorithm based on an encryption key, wherein the encryption key is obtained by a key exchange process between the first device and a second device through a preset communication channel;
• assigning, by the first device, an identifier for the encrypted data;
• and
• sending, by the first device, the encrypted data with the identifier to the second device.