Methods and devices for recovering reception in untracked positioning using ultra-wideband devices

A non-transitory machine-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to perform:

• receiving a first encrypted message from a device;
• decrypting the first encrypted message based on a first index yielding a first decrypted message;
• determining that the first decrypted message was decrypted unsuccessfully;
• updating the first index to a second index;
• decrypting the first encrypted message based on the second index yielding a second decrypted message, wherein second decrypted message includes first data;
• determining that the second decrypted message was decrypted successfully;
• and
• updating the second index to a third index.

A device, comprising:

• a transceiver;
• a non-transitory memory storing instructions;
• and
• one or more hardware processors configured to execute the instructions to cause the device to perform operations comprising:
• receiving a first encrypted message from a second device;
• decrypting the first encrypted message based on a first index yielding a first decrypted message;
• determining that the first decrypted message was decrypted unsuccessfully;
• updating the first index to a second index;
• decrypting the first encrypted message based on the second index yielding a second decrypted message, wherein second decrypted message includes first data;
• determining that the second decrypted message was decrypted successfully;
• and
• updating the second index to a third index.