发明授权
- 专利标题: Semiconductor memory card and computer readable program
- 专利标题(中): 半导体存储卡和计算机可读程序
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申请号: US10512149申请日: 2004-02-04
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公开(公告)号: US07303135B2公开(公告)日: 2007-12-04
- 发明人: Futoshi Nakabe , Shinji Kawano
- 申请人: Futoshi Nakabe , Shinji Kawano
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: JP2003-027683 20030204
- 国际申请: PCT/JP2004/001144 WO 20040204
- 国际公布: WO2004/070728 WO 20040819
- 主分类号: G06K19/06
- IPC分类号: G06K19/06
摘要:
The present invention provides a semiconductor memory card which no longer allows an illegal practice of acquiring contents of a deleted file. Here, when a deletion event is generated, a deletion handler gives a priority to a null-clear operation of a file entry and a FAT for a file to be deleted over a null-clear operation to other constituents of the file. A null-clear operation to a file entity of the file is distributed to a plurality of event handlers including the deletion handler.
公开/授权文献
- US20050226072A1 Semiconductor memory card and computer readable program 公开/授权日:2005-10-13