US 12,328,390 B2
Identity and privacy preservation in asynchronous communications
HongQian Karen Lu, Austin, TX (US); Asad Ali, Austin, TX (US); and Michael Hutchinson, Cedar Park, TX (US)
Assigned to THALES DIS FRANCE SAS, Meudon (FR)
Filed by THALES DIS France SAS, Meudon (FR)
Filed on Jun. 2, 2022, as Appl. No. 17/830,398.
Prior Publication US 2023/0396418 A1, Dec. 7, 2023
Int. Cl. H04L 9/40 (2022.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01); H04L 67/55 (2022.01)
CPC H04L 9/0847 (2013.01) [H04L 9/0825 (2013.01); H04L 9/3236 (2013.01); H04L 67/55 (2022.05); H04L 2209/04 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method for ensuring user privacy in a publisher-subscriber communications environment having at least one publisher node and a plurality of subscribers nodes in relation to publisher-subscriber communication regarding user activity, the method comprising:
storing, by a user-identifier mapping server, a user-identifier database mapping user identifier to subscriber-anonymized user identifier and subscriber identifier for users of said plurality of subscribers nodes;
receiving, by the user-identifier mapping server, an information-request message from a recipient subscriber node, the information-request message concerning a notification message from a publisher node, the notification message including an anonymized user identifier of a first user of the publisher node and wherein the user identifier of the first user is anonymized using a one-way anonymization function; and
upon receiving, by the user-identifier mapping server, the information-request message, determining from the user-identifier database whether the first user is a user of the recipient subscriber node and transmitting a response message to the recipient subscriber node indicating whether the first user is a user of the recipient subscriber node.