公开(公告)号：US20190266359A1

公开(公告)日：2019-08-29

申请号：US16412145

申请日：2019-05-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dechao LI ,  Yu LIU ,  Haofeng WANG

IPC: G06F21/75 ,  G06F1/08 ,  H04L9/00

Abstract: The disclosure describes a security system, including a security element and a clock randomization processing unit. The clock randomization processing unit is configured to: receive a clock signal, randomly change arrangement of high-level steps or low-level steps in the clock signal, and provide a changed clock signal to the security element. The security system in an embodiment of the present invention first performs randomization processing on the clock signal before inputting the clock signal to the security element, and then inputs a randomized clock signal to the security element. The randomized clock signal causes a module inside the security element to work irregularly. Therefore, it is much more difficult to perform analysis in a side-channel attack, and a security capability of the security element is improved.