公开(公告)号：US20250167837A1

公开(公告)日：2025-05-22

申请号：US18952488

申请日：2024-11-19

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Satya CHAN ,  Hee Wook KIM ,  Dae Sub OH

IPC: H04B7/04 ,  H04L5/00 ,  H04L25/02

Abstract: A security enhancement method, performed by a controller controlling a reconfigurable intelligent surface (RIS), may comprise: selecting first RIS elements for a first signal transmitted between a transmitter and a first receiver that is a legitimate receiver, the first RIS elements including at least part of elements of the RIS; transmitting the first signal to the first receiver using the first RIS elements; and dynamically rendering a channel with another receiver or an eavesdropper without changing a channel with the first receiver during a channel coherence time between the transmitter and the first receiver, by changing phase(s) of at least part of the first RIS elements at least once during the channel coherence time.