Authorizing programming of an implanted device using second factor
Described herein are techniques to ensure a user using an external device is authorized to connect and connecting to a correct implantable medical device using a wireless communication protocol. A request for authorization is sent to the external device from the implantable medical device, and the authorization can be provided by an authorization pulse sent using the implantable medical device charger over the inductive link between the charging device and the implanted device. The authorization pulse can be trusted because the inductive link is short range, ensuring the patient is aware of the connection to the implanted device. Once the implanted device receives the authorization pulse, it may finalize the pairing over the first connection.
1. A method for ensuring secure pairing with a medical device, the method comprising:
receiving, by the medical device, a request to pair from an external device over a first communication path;
in response to receiving the request to pair, enable, by the medical device, a window of exclusivity for the external device such that the medical device refuses requests to pair from any other device during the window of exclusivity;
in response to the request to pair, transmit, by the medical device, an authorization instruction message to the external device over the first communication path;
while the request to pair is pending, receive, via a second communication path, an authorization pulse from an authorization device, wherein the authorization device is not the external device; and
in response to receiving the authorization pulse, finalizing the pairing with the external device.
2. The method of claim 1 , wherein the authorization device is a charging device for the medical device.
3. The method of claim 1 , wherein the authorization pulse is an encoded command instructing the medical device to authorize the request to p air.
4. The method of claim 1 , wherein the request to pair is a request to initiate a pairing relationship between the medical device and the external device using short-wavelength ultra-high frequency radio waves.
5. The method of claim 1 , wherein the medical device is implanted into a patient, and wherein the external device is configured with an interface for obtaining information from or setting parameters of the medical device.
6. The method of claim 1 , wherein engaging the window of exclusivity for the external device comprises cancelling a broadcast message.
7. The method of claim 1 , wherein engaging the window of exclusivity comprises declining all other pairing requests over a communication protocol of the first communication path.
8. The method of claim 1 , wherein the authorization instruction message comprises an instruction to display a message on a graphical user interface of the external device requesting the authorization pulse.
9. The method of claim 1 , wherein the authorization instruction message comprises an instruction to display a message on a graphical user interface of the external device requesting the authorization pulse with the authorization device.
10. The method of claim 1 , wherein the authorization instruction message comprises digital human-comprehensible content describing how a user can cause the authorization device to provide the authorization pulse.
11. The method of claim 1 , further comprising:
securing communication with the external device over the first communication path using an encrypted key pair.
12. The method of claim 1 , wherein the second communication path is an inductive communication path.
13. The method of claim 1 , wherein the second communication path is a near-field communication path.
14. The method of claim 1 , wherein the authorization pulse comprises metadata uniquely identifying the authorization device.