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Memory data encryption/decryption method

A memory data, encryption and decryption 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 keeping the encryption key unchanged and malicious attacks, and reduce malicious attacks , the effect of improving safety

Active Publication Date: 2018-01-09
HYGON INFORMATION TECH CO LTD
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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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  • Memory data encryption/decryption method
  • Memory data encryption/decryption method
  • Memory data encryption/decryption method

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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 memory data encryption / decryption method and belongs to the technical field of data encryption / decryption processing. The method comprises the steps that S1, a processor module sends a key updating request to an encryption module, and the encryption module generates a new key generated after receiving the request; and S2, for each encrypted memory page in a memory, the encryption module decrypts memory page data corresponding to an old key by using the old key and re-encrypts each piece of decrypted page data by using the new key. By using the memory data encryption / decryption method provided by the invention, malicious attack caused by the encryption key constant for an SME technology can be effectively reduced, so that the security of memory encryption is remarkably improved; and the flexibility of a security scheme is improved, so that a user and a system can dynamically update the encryption / decryption key 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 ...

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Application Information

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