Patent ID: 11917402
Assignee: NORDIC SEMICONDUCTOR ASA
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of digital radio communication between a first device and a second device comprising:
one of the first and second devices transmitting to the other an advertising packet comprising a first address and a further data portion;
one of the first and second devices transmitting to the other at least one encryption key;
the first device generating a second address by:
encrypting an identity value derived from at least part of said first address using said encryption key and said further data portion, to provide a first portion of the second address; and
encrypting the first portion using the encryption key or a further encryption key to generate a second portion of the second address;

said first device transmitting to the second device a connection request or further advertising packet comprising said second address;
the second device receiving said connection request or further advertising packet, decrypting said second portion of said second address using said encryption key or said further encryption key to determine correspondence with said first portion;
if said correspondence is determined, the second device decrypting said first portion using the encryption key, said identity value and said further data portion; and
said second device comparing said first portion to an expected identity value derived from the first address.