Patent · US Active

Data protection method and apparatus

US10614238B2 · kind B2 · utility

0Cited by

3References

16Claims

0Family size

Assignee

Huawei Technologies Co., Ltd. · CN

Inventors

Yutao Liu · Shanghai, CN
Yubin Xia · Shanghai, CN
Haibo Chen · Shanghai, CN

Key dates

Filing date	Nov 22, 2017
Grant date	Apr 7, 2020
Priority date	—
Expiry date	Jul 17, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG06F2221/034
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A data protection method includes detecting whether critical code of an application has been called, with the critical code being used to access critical data; switching from a preconfigured first extended page table (EPT) to a preconfigured second EPT according to preset trampoline code corresponding to the critical code when an operating system calls the critical code using the first EPT, wherein memory mapping relationships of the critical data and the critical code are not configured in the first EPT, the memory mapping relationships of the critical data and the critical code are configured in the second EPT, and the critical data and the critical code are separately stored in independent memory areas; and switching from the second EPT back to the first EPT according to the trampoline code after calling and executing the critical code using the second EPT.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.