Presentation 2002/7/12
A Note on an Anonymous Loan System
Rie SHIGETOMI, Akira OTSUKA, Takahide OGAWA, Hideki IMAI,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Recently, paper based transactions are being replaced by digitized transactions in rapid pace. These kind of digitized data is useful compared to paper based data in sense of the flexibility of the data. Loan Service, (for example, Library, Rental video, debt etc.,) is among the services that makes use of sophisticated digitized transactions. Loan services handle a lot of personal information, which enables the administrators of the information, the analysis of personal hobby and tastes, or even living levels. This leads to a large privacy problem. We examined ways to avoid this privacy problem. One solution is to use "An Anonymous Loan" that the user can be anonymous while borrowing and returning, but the anonymity is unveiled on the due date without return. In this paper, we will suggest a new version "An Anonymous Loan System" that the loan party is allowed to control the number of rights transact by one user, using tamper resistance device and electronic cash scheme for off-line payment.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Electronic cash / Privacy Protection / Optimistic Protocol / Timed-release Encryption / Anonymity Revocation
Paper # ISEC2002-35
Date of Issue

Conference Information
Committee ISEC
Conference Date 2002/7/12(1days)
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Paper Information
Registration To Information Security (ISEC)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Note on an Anonymous Loan System
Sub Title (in English)
Keyword(1) Electronic cash
Keyword(2) Privacy Protection
Keyword(3) Optimistic Protocol
Keyword(4) Timed-release Encryption
Keyword(5) Anonymity Revocation
1st Author's Name Rie SHIGETOMI
1st Author's Affiliation Tsuda College()
2nd Author's Name Akira OTSUKA
2nd Author's Affiliation Institute of Industrial Science, University of Tokyo
3rd Author's Name Takahide OGAWA
3rd Author's Affiliation Tsuda College
4th Author's Name Hideki IMAI
4th Author's Affiliation Institute of Industrial Science, University of Tokyo
Date 2002/7/12
Paper # ISEC2002-35
Volume (vol) vol.102
Number (no) 212
Page pp.pp.-
#Pages 8
Date of Issue