Invention Grant
US07661132B2 Tag privacy protection method, tag device, backend apparatus, updater, update solicitor and record medium carrying such programs in storage
有权
标签隐私保护方法，标签设备，后端设备，更新器，更新服务器和存储中携带此类程序的记录介质
- Patent Title: Tag privacy protection method, tag device, backend apparatus, updater, update solicitor and record medium carrying such programs in storage
- Patent Title (中): 标签隐私保护方法，标签设备，后端设备，更新器，更新服务器和存储中携带此类程序的记录介质
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Application No.: US10537915Application Date: 2004-09-27
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Publication No.: US07661132B2Publication Date: 2010-02-09
- Inventor: Miyako Ohkubo , Koutarou Suzuki , Shingo Kinoshita
- Applicant: Miyako Ohkubo , Koutarou Suzuki , Shingo Kinoshita
- Applicant Address: JP Tokyo
- Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2003-334891 20030926; JP2003-359157 20031020; JP2003-383760 20031113; JP2004-124610 20040420; JP2004-145366 20040514
- International Application: PCT/JP2004/014113 WO 20040927
- International Announcement: WO2005/014113 WO 20050217
- Main IPC: G06F21/00
- IPC: G06F21/00 ; H04L9/32
Abstract:
A tag device causes a second calculator to read a confidential value from a confidential value memory and to apply a second function F2 which disturbs a relationship between elements of a definition domain and a mapping thereof to generate tag output information. The tag device delivers the tag output information to a backend apparatus. Subsequently, a first calculator reads out at least part of elements of the confidential value from the confidential value memory, and applies a first function F1, an inverse image of which is difficult to obtain, and a result of such calculation is used to update a confidential value in the confidential value memory by overwriting.
Public/Granted literature
Information query
