Title:
フラッシュメモリ及び電子装置のためのセキュアなデジタル証明書の保存方法
Document Type and Number:
Japanese Patent JP4843051
Kind Code:
B2
Abstract:
A method for storing and updating digital certificates in a flash memory, a flash memory, and an electronic apparatus exploiting the method are disclosed. The method is applicable for a flash memory having predefined erase-write blocks and write-read blocks, for enhancing the tampering proof characteristics of the flash memory. The certificates may be used to authenticate a computer program and may be verified by a verification program associated with the computer program. The method may include defining a plurality of memory slots within at least one erased erase-write block wherein each memory slot have a commencing address comprising a binary “0”- or a binary “1” bit pattern, writing a first and second digital certificate in a first and second one of the memory slots, defining a certificate slot address pointer, and updating the certificate slot address pointer by replacing said “0”- or “1”-bit pattern of the pointer with a “1”- or a “0” bit pattern, respectively.
Inventors:
Addition, Stefan
Johansson, Werner
Lindgren, Stefan
Johansson, Werner
Lindgren, Stefan
Application Number:
JP2008542695A
Publication Date:
December 21, 2011
Filing Date:
November 01, 2006
Export Citation:
Assignee:
Sony Ericsson Mobile Communications, AB
International Classes:
G06F21/24; G06F12/00; G06F21/02; G06F21/22; H04L9/10
Domestic Patent References:
| JPH05250269A | 1993-09-28 |
Foreign References:
| WO2000072149A1 | 2000-11-30 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura