发明申请
US20050251866A1 Storage medium and method and apparatus for separately protecting data in different areas of the storage medium
审中-公开
用于在存储介质的不同区域中分别保护数据的存储介质和方法和装置
- 专利标题: Storage medium and method and apparatus for separately protecting data in different areas of the storage medium
- 专利标题(中): 用于在存储介质的不同区域中分别保护数据的存储介质和方法和装置
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申请号: US11167638申请日: 2005-06-27
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公开(公告)号: US20050251866A1公开(公告)日: 2005-11-10
- 发明人: Hiroyuki Kobayashi , Yoshiaki Uchida
- 申请人: Hiroyuki Kobayashi , Yoshiaki Uchida
- 专利权人: FUJITSU LIMITED.
- 当前专利权人: FUJITSU LIMITED.
- 优先权: JP10-068881 19980318
- 主分类号: G06F12/14
- IPC分类号: G06F12/14 ; G06F1/00 ; G06F3/06 ; G06F21/00 ; G06F21/24 ; H04L9/00 ; G06F11/30 ; H04L9/32
摘要:
Disclosed are a method and an apparatus for protecting data on a storage medium by encrypting the data to be recorded on the storage medium with a password. This method comprises a step of, generating, for changing key data on each memory unit by one password, the key data, thereafter encrypting the key data with the password and writing the encrypted data to the storage medium, and a step of encrypting the data with the key data and encrypted data to the storage medium. The method further comprises a step of reading the encrypted key data from the storage medium, a step of decoding the encrypted key data with the password, and a step of decoding the data on the storage medium with the decoded key data. The encryption is done by using the key data generated separately from the password, and it is therefore feasible to prevent the password from being analyzed by decoding a cipher text.