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Memory system with in stream data encryption / decryption and error correction

A memory system and memory technology, applied in the field of memory systems

Active Publication Date: 2012-05-16
SANDISK TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current error correction schemes may not be compatible with portable storage devices with encryption capabilities, so there is a need for an improved local storage device that alleviates this problem

Method used

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  • Memory system with in stream data encryption / decryption and error correction
  • Memory system with in stream data encryption / decryption and error correction
  • Memory system with in stream data encryption / decryption and error correction

Examples

Experimental program
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Embodiment Construction

[0011] figure 1 The block diagram of FIG. 2 illustrates an exemplary memory system in which aspects of the invention may be implemented. Such as figure 1 As shown, the memory system 10 includes: a central processing unit (CPU) 12, a buffer management unit (BMU) 14, a host interface module (HIM) 16, a flash interface module (FIM) 18, a flash memory 20, and peripheral access module (PAM)22. Memory system 10 communicates with host device 24 through host interface bus 26 and port 26a. Flash memory 20 , which may be a NAND type, provides data storage for host device 24 . Software code for CPU 12 may also be stored in flash memory 20 . FIM 18 is connected to flash memory 20 through flash interface bus 28 and port 28a. HIM 16 is suitable for connection to host systems such as digital cameras, personal computers, personal digital assistants (PDAs), digital media players, MP3 players, and cellular phones or other digital devices. Peripheral access module 22 selects the appropriat...

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PUM

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Abstract

The throughput of the memory system is improved where error correction of data in a data stream is cryptographically processed with minimal involvement of any controller. To perform error correction when data from the memory cells are read, the bit errors in the data in the data stream passing between the cells and the cryptographic circuit are corrected prior to any cryptographic process performed by the circuit. Preferably the error correction occurs in one or more buffers employed to buffer the data between the cryptographic circuit and the memory where latency is reduced by using multiplebuffers.

Description

technical field [0001] The present invention relates generally to memory systems, and more particularly to memory systems with in-stream data encryption / decryption and error correction. Background technique [0002] The mobile device market is moving towards including content storage, thereby increasing average revenue by generating more data exchange, which means that content must be protected when stored on mobile devices. [0003] Portable storage devices have been used in commerce for many years. They transfer data from one computing device to another or store backup data. More complex portable storage devices, such as portable hard drives, portable flash memory disks and flash memory cards, include a microprocessor to control the storage management. [0004] To protect content stored in portable storage devices, the stored data is usually encrypted and only authorized users are allowed to decrypt the data. [0005] Because the data stored in the portable storage devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/10G06F12/14G06F21/60G06F21/62G06F21/71
CPCG06F12/1408G06F11/1008G06F11/1076G06F12/14
Inventor 迈克尔·霍尔茨曼巴鲁赫·B·科亨穆罕默德·R·伊斯兰马修·戴维森
Owner SANDISK TECH LLC