US 11,930,356 B2
Three-party cryptographic handshake protocol
Marcel M. M. Yung, New York, NY (US); and David Lazarov, Petah Tikva (IL)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/603,325
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Apr. 5, 2021, PCT No. PCT/US2021/025733
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2021/211314, PCT Pub. Date Oct. 21, 2021.
Claims priority of provisional application 63/010,288, filed on Apr. 15, 2020.
Prior Publication US 2022/0124491 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01); H04W 12/0471 (2021.01)
CPC H04W 12/0471 (2021.01) [H04L 9/0869 (2013.01); H04L 63/0435 (2013.01); H04L 2209/80 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of securely communicating a message from a sighter to an owner, the method comprising:
receiving, from a beacon, a packet including an end-to-end encrypted ephemeral identifier (E2EE-EID);
generating the message for the owner;
selecting a private key;
computing an exchanged key using the private key and the E2EE-EID;
extracting, from the exchanged key, a common symmetric key;
encrypting the message using the common symmetric key; and
transmitting the encrypted message to the owner.