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Tag privacy protection method, tag device, backend apparatus, updater, update solicitor and record medium carrying such programs in storage
Tag privacy protection method, tag device, backend apparatus, updater, update solicitor and record medium carrying such programs in storage
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机译:标签隐私保护方法,标签设备,后端设备,更新器,更新律师以及在存储装置中携带此类程序的记录介质
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摘要
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.
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