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A method for encrypting and decrypting memory data

A memory and memory page technology, applied in the direction of digital data protection, internal/peripheral computer component protection, input/output to record carrier, etc., can solve the problems of malicious attacks, encryption keys remain unchanged, etc., to reduce malicious attacks, The effect of improving safety

Active Publication Date: 2021-04-20
HYGON INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for encrypting and decrypting memory data, which solves the problem of malicious attacks caused by keeping the encryption key unchanged

Method used

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  • A method for encrypting and decrypting memory data
  • A method for encrypting and decrypting memory data
  • A method for encrypting and decrypting memory data

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Embodiment Construction

[0018] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0019] Such as figure 2 and 3 As shown, the present invention provides a method for encrypting and decrypting memory data, the method comprising:

[0020] S1. The processor module 1 sends a key update request to the encryption module 2, and the encryption module generates a new key after receiving the request;

[0021] S2. For each encrypted memory page in the memory, the encryption module 2 decrypts the corresponding memory page data with the old key, and re-encrypts each decrypted page data with the new key.

[0022] By using a method for encrypting and decrypting memory data provided by the present invention, not only can effectively reduce the malicious attack caused by keeping the encryption key of SME technology unchanged, thereby significantly improving the security of memory encryption; Flexibility, users a...

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Abstract

The invention provides a method for encrypting and decrypting memory data, which belongs to the technical field of data encryption processing. The method includes S1, the processor module sends a key update request to the encryption module, and the encryption module generates a new key after receiving the request; S2, for each encrypted memory page in the memory, the encryption module uses the old The key decrypts the corresponding memory page data, and uses the new key to respectively re-encrypt each decrypted page data. By using a method for encrypting and decrypting memory data provided by the present invention, not only can effectively reduce the malicious attack caused by keeping the encryption key of SME technology unchanged, thereby significantly improving the security of memory encryption; Flexibility, users and systems can dynamically update encryption and decryption keys as needed.

Description

technical field [0001] The invention relates to the technical field of data encryption, in particular to a method for encrypting and decrypting memory data. Background technique [0002] With the increasing complexity of modern computer systems, and the increasing security requirements of computing environments for emerging technologies such as cloud computing and big data that have emerged in recent years, the industry generally realizes that it is necessary to fully support computer systems from the underlying hardware. Data encryption function. Among them, American CPU design and manufacturer AMD Semiconductor Corporation proposed Secure Memory Encryption (SME) technology (see [1] AMD Memory Encryption White Paper for details; [2] Password protection of information in processing systems (patent: CN106062768A)) . This technology adds a memory encryption module on the basis of the existing CPU hardware, so that the data is encrypted and then written into the memory; when ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/79G06F21/60G06F3/06
Inventor 许海波应志伟杜朝晖
Owner HYGON INFORMATION TECH CO LTD