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Flash memory storage system, controller and data protection method

A storage system and memory technology, applied in static memory, digital memory information, information storage, etc., can solve the problems of limited storage capacity, smart card limited integrated circuit specifications, etc., and achieve the effect of ensuring reliability

Active Publication Date: 2010-06-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the smart card itself is limited by the specification of its integrated circuit, so the storage capacity is limited

Method used

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  • Flash memory storage system, controller and data protection method
  • Flash memory storage system, controller and data protection method
  • Flash memory storage system, controller and data protection method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0047] figure 1 is a schematic block diagram illustrating a flash memory storage system according to an embodiment of the present invention. Please refer to figure 1 , the flash memory storage system 100 includes a controller (also called a controller system) 110 and a flash memory chip (flash memory chip) 120 .

[0048] The flash memory storage system 100 has a data protection function designed according to this embodiment, therefore, the flash memory storage system 100 can be used to store secure data that needs to be protected. For example, in this embodiment, the flash memory storage system 100 is used in combination with a smart card as a storage medium for storing security data of the smart card. The data protection method according to this embodiment will be described in detail later. In this embodiment, the flash memory storage system 120 is a small-sized memory card chip to facilitate combination with the current smart card chip 200 . But it must be understood tha...

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Abstract

The invention relates to a flash memory storage system, a controller and a data protection method. The flash memory storage system comprises a controller provided with an overridable type nonvolatile memory and a flash memory chip. When writing safety data in the flash memory chip, the controller can randomly generate a data mark and generate a message abstract based on the written safety data and the data mark by using unidirectional hash functions, wherein the data mark and the message abstract can be respectively stored in the overridable type nonvolatile memory and the flash memory chip. Afterwards, when reading the safety data from the flash memory chip, the controller can judge whether the read safety data is manipulated or not depending on the data mark and the message abstract of the overridable type nonvolatile memory and the flash memory chip. Based on above, the safety data of the flash memory chip can be efficiently protected.

Description

technical field [0001] The invention relates to a flash memory storage system, and in particular to a flash memory storage system with data protection function, its controller and data protection method. Background technique [0002] As users gradually accept the use of electronic wallets and prepaid stored value, the use of smart cards is becoming more and more popular. A Smart Card is an integrated circuit chip (IC chip) having components such as a microprocessor, a card operating system, a security module, and a memory to allow a holder to perform predetermined operations. The smart card provides computing, encryption, two-way communication and security functions, making this card not only store data, but also protect the stored data. The Subscriber Identification Module (SIM) card used in the cellular phone using the global system for mobile communications (GSM) mechanism is one example of the application of the smart card. In general, smart cards are inherently limite...

Claims

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Application Information

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IPC IPC(8): G07F7/10G11C7/24G11C7/10G06F12/14
Inventor 詹清文
Owner SAMSUNG ELECTRONICS CO LTD
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