	US 12,034,320 B2
	Wireless power charging with authentication
Changjae Kim, San Jose, CA (US); Damla Acar, La Mesa, CA (US); Adnan Dzebic, San Jose, CA (US); Pooja Agrawal, Milpitas, CA (US); and Sophia Yi, Milpitas, CA (US)
Assigned to Renesas Electronics America Inc., Milpitas, CA (US)
Filed by Renesas Electronics America Inc., Milpitas, CA (US)
Filed on May 14, 2021, as Appl. No. 17/321,312.
Claims priority of provisional application 63/036,395, filed on Jun. 8, 2020.
Prior Publication US 2021/0384747 A1, Dec. 9, 2021
Int. Cl. H04L 29/06 (2006.01); G06F 21/30 (2013.01); H02J 7/00 (2006.01); H02J 50/10 (2016.01); H02J 50/80 (2016.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01)

CPC H02J 7/00045 (2020.01) [G06F 21/30 (2013.01); H02J 50/10 (2016.02); H02J 50/80 (2016.02); H04L 9/0869 (2013.01); H04L 9/3236 (2013.01); H04L 9/3239 (2013.01)]

19 Claims

1. A method of authentication, comprising:

receiving a signal strength packet (SSP) value, an ID, and a random number RND from a wireless power receiver;

determining an index based on the RND;

choosing a base code from a set of base codes according to the index;

determining a secure code from the base code, the index, the RND, the SSP value, and the ID; and

transmitting the secure code to the wireless power receiver,

wherein determining the index includes

determining at least one transmit random number TX RND; RND, and

convoluting the RND with the at least one TX RND to yield the index, wherein the index is in a range that spans the set of base codes.