US 12,348,532 B2
Method and apparatus for resisting downgrade attack for private limited connection
Johannes Berg, Detmold (DE); Ido Ouzieli, Tel Aviv (IL); Po-Kai Huang, San Jose, CA (US); Ilan Peer, Modiin (IL); and Emily Qi, Gig Harbor, WA (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Jun. 25, 2021, as Appl. No. 17/358,043.
Prior Publication US 2021/0320935 A1, Oct. 14, 2021
Int. Cl. H04L 29/06 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/1416 (2013.01) [H04L 63/0435 (2013.01); H04L 63/102 (2013.01); H04L 63/1425 (2013.01); H04L 63/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
performing a 4-way handshake between an initiating entity and a responding entity to establish a Pairwise Master Key Security Association (PMKSA);
receiving, by the initiating entity, a frame from the responding entity during the 4-way handshake, wherein the frame comprises an indication of usage of private limited connection for all responding entities in a network identified by a SSID of the responding entity;
establishing, by the initiating entity, a private limited connection in the network identified by the SSID of the responding entity; and
performing frame exchanges between the initiating entity and any of responding entities in the network identified by the SSID of the responding entity using the private limited connection, wherein the frame exchange using the private limited connection comprises only basic and standardized capability and operation elements, and
wherein the initiating entity is a non-AP STA and the responding entity is an AP; or
wherein the initiating entity is a non-AP Multi-link device (MLD) and the responding entity is an AP MLD.