Security without identification: transaction systems to make big brother obsolete
Communications of the ACM
Optimistic protocols for fair exchange
Proceedings of the 4th ACM conference on Computer and communications security
A Practical and Provably Secure Coalition-Resistant Group Signature Scheme
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Conditional oblivious transfer and timed-release encryption
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
A privacy preserving rental system
ISC'05 Proceedings of the 8th international conference on Information Security
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Recently, paper based transactions are being replaced by digitized transactions in a rapid pace. These kinds of digitized data are useful compared to paper based data in the sense of the flexibility of the data. Loan services, (for example, Library, Rental video, debt etc.,) are among the services that makes use of sophisticated digitized transactions. Loan services handle a lot of personal information, which enables the analysis of personal hobby and tastes, or even life style. Hence, administrators who control the loan information are able to obtain personal information of customers, which leads to a large privacy problem. We have examined a way 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 only after the due date without return. We will suggest An Anonymous Loan System using tamper resistance device and Group Signature Scheme.