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Nested page table measurement method and device and related equipment

A technology of nested page tables and measurement methods, applied in computer security devices, instruments, electrical digital data processing, etc., can solve problems such as leakage of confidential information, virtual machine memory data security threats, etc., to improve security and ensure integrity Effect

Pending Publication Date: 2021-01-22
HYGON INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current virtualization technology, the nested page table (Nested Page Table, NPT) of the virtual machine is maintained by the host, so that the host can make the virtual machine leak confidential information or Execute unauthorized code, posing a threat to the security of virtual machine memory data

Method used

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  • Nested page table measurement method and device and related equipment
  • Nested page table measurement method and device and related equipment
  • Nested page table measurement method and device and related equipment

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Embodiment Construction

[0037] In the field of virtualization technology, the data or codes in the virtual machine are visible to the host, and when the host is untrusted or attacked, the security of the virtual machine cannot be guaranteed. Encrypted virtualization is based on the built-in security processor of the CPU (Central Processing Unit, processor), and uses randomly generated secret keys to encrypt and protect the memory of the virtual machine to improve the security of the virtual machine.

[0038] Among them, when encryption virtualization technology generates secret keys, different random secret keys are generated for different virtual machines, and the secret keys are only visible to the security processor, not to the host, so that when the host reads the memory of the virtual machine , all read are ciphertexts, which prevents the host or other virtual machines from stealing the information in the virtual machine, so as to enhance the confidentiality of the information in the virtual mach...

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Abstract

The embodiment of the invention provides a nested page table measurement method and device and related equipment, and the method comprises the steps that a safety processor can measure the NPT of a virtual machine when the virtual machine is in an operation state, obtains an NPT measurement result of the virtual machine, and transmits an abnormality notification to the virtual machine when the NPTmeasurement result is abnormal, therefore, the virtual machine is enabled to execute the exception processing flow of the virtual machine based on the exception notification, the integrity of the NPTof the virtual machine is ensured, and the security of the virtual machine is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of trustworthiness measurement, and in particular to a nested page table measurement method, device and related equipment. Background technique [0002] Through virtualization technology (Virtualization), the physical host can virtualize multiple virtual machines (VirtualMachine, VM), so as to maximize the use of hardware resources of the physical host; each virtualized virtual machine can be allocated memory (space) , the memory allocated by each virtual machine can load the virtual machine code used to support the running of the virtual machine. [0003] In the current virtualization technology, the nested page table (Nested Page Table, NPT) of the virtual machine is maintained by the host, so that the host can make the virtual machine leak confidential information or Execution of unauthorized code poses a threat to the security of virtual machine memory data. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): G06F21/55
CPCG06F21/556G06F2221/033Y02D10/00
Inventor 陈善应志伟
Owner HYGON INFORMATION TECH CO LTD