Access point and method for connecting communication with external device thereof

An access point, comprising:

• a communicator comprising communication circuitry;
• a memory including at least one command;
• and
• a processor connected to the communicator and the memory, the processor being configured to control the access point,
• wherein the processor, by executing the at least one command, is further configured to control the access point to:
• acquire information on a first encryption key corresponding to an external device from a user terminal through the communicator,
• perform a communication connection with the external device using the first encryption key through the communicator based on a request for communication connection using the first encryption key being received from the external device,
• generate a second encryption key corresponding to the external device while the communication connection using the first encryption key is performed,
• control the communicator to transmit the generated second encryption key to the external device, and
• perform communication connection with the external device using the second encryption key through the communicator based on a request for communication connection using the second encryption key being received from the external device after the communication connection using the first encryption key is terminated.