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Method for sharing memory between at least two functional entities

A functional entity, memory technology, applied in memory systems, preventing unauthorized use of memory, instruments, etc., can solve the problems of MPU not allowing cancellation, address bus error injection, etc.

Active Publication Date: 2020-12-04
RAMBUS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the MPU does not allow to counteract all known attacks, and in particular fault injection on the address bus

Method used

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  • Method for sharing memory between at least two functional entities
  • Method for sharing memory between at least two functional entities
  • Method for sharing memory between at least two functional entities

Examples

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Embodiment Construction

[0037] figure 1 is a block diagram of a device DV1 according to the invention comprising two functional entities E1, E2 and a memory MEM1, such as a random access memory (RAM). The memory comprises two distinct and disjoint memory areas M1 and M2 dedicated to functional entities E1 and E2 respectively, each functional entity being configured to write and read data DT in the memory area allocated to it.

[0038] The functional entities E1 , E2 and the memory MEM1 are arranged on the same interconnection support 1 or on different interconnection supports arranged and interconnected in the housing 2 of the device. The interconnect support 1 may be a semiconductor chip if the functional entity and the memory are integrated on the same semiconductor chip, or may be a printed circuit board if the functional entity and the memory are integrated on different semiconductor chips. The functional entities and / or memories can likewise be arranged on different printed circuit boards. The...

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Abstract

The invention relates to a method for sharing a memory (MEM1) between two functional entities (E1, E2), comprising the steps of: assigning to the first functional entity a first data transformation function (T1) and a first inverse transformation function (I1), and assign a second data transformation function (T2) and a second inverse transformation function (I2) to the second functional entity (E2), the second inverse transformation function (I2) is different from the first transformation function (T1) are compatible, and the first inverse transform function (I1) is not compatible with the second transform function (T2).

Description

technical field [0001] The present invention relates to a method for sharing a memory in a device comprising at least one memory and at least two functional entities arranged on the same support or in the same housing, the first functional entity being configured as at least one of the memory Data is written and read in the first area, and the second functional entity is configured to write and read data in at least a second area of ​​the memory. Background technique [0002] The sharing of memory in devices of the type described above raises various problems with the data stored in the memory when a degree of security is sought. Since their components are arranged in the same rack or at least in the same housing and are therefore physically accessible, such devices are vulnerable to fraudsters who may attempt to control functional entities to access the access assigned to another A memory area for a functional entity. In addition to controlling risk, another known type of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/14G06F21/64G06F21/74G06F21/79
CPCG06F12/145G06F12/1491G06F21/64G06F21/74G06F21/79G06F12/1441G06F3/0622G06F3/0637G06F3/0644G06F3/0659G06F3/0673
Inventor V·杜帕奎斯S·戈津斯基
Owner RAMBUS INC