Method for secure synchronization and pairing between devices and apparatus using the method

A method that is performed by an electronic device, the method comprising:

• generating a first signal by detecting a biomedical signal;
• generating a second signal by detecting a motion;
• providing a secure communication channel with another electronic device;
• receiving a third signal through the secure communication channel;
• generating a secret key for the secure communication channel, based on the first signal;
• and
• determining whether to perform a predetermined function, based on the second signal and the received third signal.

An electronic device comprising:

• a biomedical sensor configured to generate a biomedical signal;
• a motion sensor configured to generate a first motion signal;
• a communication interface configured to:
• provide a secure communication channel with another electronic device;
• and
• receive a second motion signal from the other electronic device through the secure communication channel;
• and
• a controller configured to:
• generate a secret key for the secure communication channel, based on the biomedical signal;
• enter a lock mode of the electronic device;
• decode the received second motion signal, using the secret key;
• determine whether the first motion signal is identical to the decoded second motion signal;
• and
• release the lock mode in response to the determination that the first motion signal is identical to the decoded second motion signal.