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Secure erase system for a solid state non-volatile memory device

A memory, solid-state technology, used in memory systems, transmission systems, digital transmission systems, etc., can solve problems such as impracticality, difficulty in safe erasure, and time-consuming

Inactive Publication Date: 2012-04-18
SKYMEDI CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this traditional secure erase technique cannot be applied to solid-state non-volatile memory devices, such as flash memory, because a single link (or logical-to-physical image) often corresponds to multiple data units (groups) in flash memory
It will take a considerable amount of time to erase all data units, and it is also a complicated task to search for all data units
These reasons often make secure erasing difficult or even impractical
[0005] In view of the fact that the traditional secure erase program cannot be applied to solid-state non-volatile memory, it is urgent to propose a novel secure erase system, which can quickly and effectively securely erase the data of non-volatile memory

Method used

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  • Secure erase system for a solid state non-volatile memory device
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  • Secure erase system for a solid state non-volatile memory device

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Embodiment Construction

[0027] figure 1 is a block diagram showing a secure erase system of a solid-state memory device according to an embodiment of the present invention. The solid-state memory device may be a solid-state non-volatile memory device, such as NAND flash memory or phase change memory, but is not limited thereto.

[0028] In this embodiment, the secure erasing system includes a front-end device 11 , an encryption unit 13 , a controller 15 , a conversion unit 17 and a memory area 19 . Wherein, the front-end device 11 serves as an interface between the secure erasing system and a host (such as a computer or a processor). Common front-end devices include Secured Digital (SD), MultiMediaCard (MMC), embedded MMC (embedded MMC, eMMC), serial advanced technology attachment (Serial Advanced technology Attachment, SATA), peripheral Component fast connection (Peripheral Component Interconnect Express, PCIe), integrated drive circuit (Integrated Drive Electronics, IDE), universal serial bus (Un...

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PUM

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Abstract

A secure erase system for a solid state memory device is disclosed. A memory area provides a data block for storing data and a key block for storing at least one key. A translation unit maps a logical address to a physical address associated with the memory area. An encryption unit encrypts plaintext data to be written to the memory area with the associated key and decrypts the encrypted data to be read by a host with the associated key. The key associated with a logical erase group to be secure erased is deleted after receiving a command requesting to erase the data associated with the logical erase group.

Description

technical field [0001] The invention relates to a solid-state memory device, in particular to a secure erase system for a solid-state non-volatile memory device. Background technique [0002] Flash memory is a non-volatile solid-state memory device that can be electrically erased and programmed. Since flash memory has been widely used in electronic systems, the data security of flash memory has become a major issue at present. [0003] Most operating systems do not actually remove data from flash memory when an erase or delete command is received. In fact, the operating system only removes or changes the link or address, while the actual data remains in the flash memory until the data is overwritten. Data can still be retrieved or recovered by intruders before it is actually removed. [0004] Therefore, many systems use a secure erase (or data wipe) procedure that completely erases data when a secure erase command is received. Traditional secure erasure technology is usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/02
CPCH04L9/00G06F12/0246G06F2221/2143G06F2212/7209G06F21/00G06F21/79G06F12/1425G06F12/00G06F12/14
Inventor 翁武坤吴信贤
Owner SKYMEDI CORPORATION
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