US 12,143,511 B2
Privacy-preserving delivery of activation codes for pseudonym certificates
Helmiton Cunha, Santa Clara, CA (US); Thomas E. Luther, Santa Clara, CA (US); Jefferson E. Ricardini Fernandes De Oliveira, Santa Clara, CA (US); Henrique S. Ogawa, Santa Clara, CA (US); Marcos A. Simplicio, Jr., São Paulo (BR); and Harsh Kupwade Patil, Palo Alto, CA (US)
Assigned to LG ELECTRONICS, INC., Seoul (KR); and UNIVERSITY OF SAO PAULO, Sao Paulo (BR)
Appl. No. 17/787,403
Filed by LG ELECTRONICS, INC., Seoul (KR); and UNIVERSITY OF SAO PAULO, Sao Paulo (BR)
PCT Filed Dec. 4, 2020, PCT No. PCT/US2020/063359
§ 371(c)(1), (2) Date Jun. 20, 2022,
PCT Pub. No. WO2021/126554, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/952,049, filed on Dec. 20, 2019.
Prior Publication US 2023/0029523 A1, Feb. 2, 2023
Int. Cl. H04L 9/32 (2006.01); H04W 12/069 (2021.01)
CPC H04L 9/3268 (2013.01) [H04W 12/069 (2021.01); H04L 2209/42 (2013.01); H04L 2209/84 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for distributing activation codes to one or more of a plurality of entities in a vehicular public-key infrastructure in a privacy-preserving manner, the method comprising:
receiving by a first entity of the plurality of entities a plurality of digital certificates for use in authentication operations with one or more of the other entities of the plurality of entities, wherein each digital certificate is to be activated by an associated activation code;
wherein one or more pseudonym identifiers are generated for the first entity, wherein each pseudonym identifier can be used as an identifier for the first entity during a corresponding activation period, wherein each pseudonym identifier is not linkable to the first entity by some other entities in the vehicular public-key infrastructure;
during a given activation period, making a request by the first entity for one or more activation codes using the pseudonym identifier corresponding to the given activation period; and
receiving by the first entity via unicast communication the requested one or more activation codes, wherein the activation codes are generated by a certificate access manager.