Encryption key exchange with compensation for radio-frequency interference

A wireless system comprising:

• an initiator that includes a first transceiver, wherein the initiator is configured to generate a new encryption key;
• and
• a responder that includes a second transceiver, wherein the responder is configured to communicate wirelessly with the initiator via the second transceiver;
• wherein the initiator is further configured to measure a radio-frequency interference at the first transceiver and determine an iteration number based upon the radio-frequency interference;
• and
• wherein the initiator is configured to transmit a key update message that includes the new encryption key to the wireless responder, wherein the key update message is encrypted with a current encryption key;
• and
• wherein the initiator is configured to resend the key update message the iteration number of times if the initiator did not receive an acknowledgement from the responder.

An initiator comprising:

• a radio-frequency transmitter;
• a memory;
• and
• a controller configured to update a current encryption key to a new encryption key, wherein the controller is further configured to encrypt a key update message that includes the new encryption key using the current encryption key, and wherein the controller is further configured to attempt to send the key update message to a wireless node a selected number of times based upon a measured radio-frequency energy at the radio-frequency transmitter.