US 12,088,634 B2
Establishing a secure communication link
Hyun J. Yoon, Vadnais Heights, MN (US); Bo Zhang, Blaine, MN (US); Robert M. Ecker, Lino Lakes, MN (US); Ryan D. Wyszynski, Oak Grove, MN (US); Joseph C. Green, Brooklyn Park, MN (US); David J. Peichel, Minneapolis, MN (US); Sudar Shields, Minneapolis, MN (US); Nicholas C. Wine, Minneapolis, MN (US); and Drew J. Thwaites, Littleton, CO (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Dec. 5, 2022, as Appl. No. 18/061,855.
Application 18/061,855 is a continuation of application No. 16/263,752, filed on Jan. 31, 2019, granted, now 11,522,919.
Prior Publication US 2023/0104064 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/40 (2022.01); A61N 1/372 (2006.01); H04L 9/06 (2006.01); H04W 12/04 (2021.01); H04W 12/63 (2021.01); H04W 52/02 (2009.01)
CPC H04L 63/205 (2013.01) [H04L 9/0631 (2013.01); H04L 63/0442 (2013.01); H04L 63/105 (2013.01); H04L 63/18 (2013.01); H04W 12/04 (2013.01); H04W 52/0229 (2013.01); A61N 1/37252 (2013.01); H04W 12/63 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A first device comprising:
signal reception circuitry configured to receive communications transmitted according to a first communication protocol;
communication circuitry configured to send communications and receive communications according to a second communication protocol different than the first communication protocol;
and processing circuitry configured to:
receive, at a first time from one or more second devices via the signal reception circuitry, a signal according to the first communication protocol;
transmit, at a second time via the communication circuitry based on receiving the signal, a set of information including a challenge and an encryption key to the one or more second devices according to the second communication protocol at a first power magnitude, wherein the first power magnitude is less than a second power magnitude, wherein the encryption key is a device key that is encrypted and transmitted together with the challenge, wherein the challenge is not encrypted, and wherein the second time occurs after the first time;
receive, at a third time from the one or more second devices via the communication circuitry based on transmitting the set of information including the challenge and the encryption key, the challenge according to the second communication protocol, wherein the challenge is encrypted, and wherein the third time occurs after the second time;
decrypt the challenge;
verify the challenge by comparing the decrypted challenge with the transmitted challenge; and
establish, via the communication circuitry based on verifying the challenge, a secure link between the first device and the one or more second devices according to the second communication protocol at the second power magnitude, wherein at least one of the first device or the one or more second devices comprises an implantable medical device (IMD) configured to be implanted within a patient and at least one other of the first device or the one or more second devices comprises an external device.