US 12,273,706 B2
Method, system, and apparatus for determining user plane security algorithm
Ao Lei, Beijing (CN); He Li, Shanghai (CN); Yizhuang Wu, Beijing (CN); and Rong Wu, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Feb. 6, 2023, as Appl. No. 18/164,697.
Application 18/164,697 is a continuation of application No. PCT/CN2021/110907, filed on Aug. 5, 2021.
Claims priority of application No. 202010785355.1 (CN), filed on Aug. 6, 2020.
Prior Publication US 2023/0179997 A1, Jun. 8, 2023
Int. Cl. H04L 29/06 (2006.01); H04W 12/033 (2021.01); H04W 12/037 (2021.01)
CPC H04W 12/033 (2021.01) [H04W 12/037 (2021.01)] 5 Claims
OG exemplary drawing
 
1. A method for determining a user plane security algorithm, comprising:
receiving, by a second terminal (UE 2), a direct communication request message from a first terminal (UE 1), wherein the direct communication request message comprises a security capability of the UE 1 and a control plane security policy of the UE 1;
determining, by the UE 2, a control plane security protection mode between the UE 2 and the UE 1 based on the control plane security policy of the UE 1 and a control plane security policy of the UE 2; and
when the control plane security protection mode is that control plane integrity protection is enabled and control plane confidentiality protection is not enabled:
sending, by the UE 2, a direct security mode command message to the UE 1, and when receiving a direct security mode complete message carrying a user plane security policy of the UE 1 from the UE 1, regardless of the user plane security policy of the UE 1 and a user plane security policy of the UE 2, determining, by the UE 2, that user plane confidentiality protection between the UE 2 and the UE 1 is not enabled, wherein
the direct security mode command message comprises a non-null integrity protection algorithm and a null confidentiality protection algorithm.