A secure non-volatile memory device and a method of protecting data therein

A secure non-volatile memory device and a method of protecting data therein

  • CN 101,517,654 B
  • Filed: 09/27/2007
  • Issued: 02/25/2015
  • Est. Priority Date: 09/29/2006
  • Status: Active Grant
First Claim
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1. a non-volatile memory device, it comprises:

  • Input end, for providing the external data (D) that will be stored in non-volatile memory device;

    First non-volatile memory block (100) and the second non-volatile memory block (200), first non-volatile memory block (100) and the second non-volatile memory block (200) are disposed on same nude film (10), wherein the first non-volatile memory block (100) and the second non-volatile memory block (200) belong to different types, thus need incompatible multiple external attack technique to come to obtain data from the first non-volatile memory block (100) and the second non-volatile memory block (200);

    AndEncrypted circuit (50), for utilizing the peculiar data (K from least the first non-volatile memory block (100), K1, K2) as encryption key, external data (D) is encrypted, thus form the data (D '"'"', D ") after encryption, and data after encryption (D '"'"';

    D ") be at least stored in the second non-volatile memory block (200)Wherein the first non-volatile memory block (100) is polysilicon fuse storer, and the second non-volatile memory block (200) is floating-gate memory, andWherein polysilicon fuse storer uses the polycrystal layer physically identical with floating-gate memory.

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