Authorizing programming of an implanted device using second factor

A medical device comprising:

• a first antenna;
• a second antenna;
• a processor;
• and
• a non-transitory computer-readable medium storing instructions that, when executed by the processor, cause the processor to:
• receive a request to pair from an external device over a first wireless communication path via the first antenna;
• in response to receiving the request to pair:
• enable, by the medical device, a window of exclusivity for pairing with the external device, and
• transmit, by the medical device, an authorization instruction message to the external device over the first wireless communication path;
• during the window of exclusivity, receive, by the medical device from the external device via a second wireless communication path via the second antenna, an authorization pulse;
• and
• in response to receiving the authorization pulse by the medical device, pairing with the external device.