Efficient identification and signatures for smart cards
EUROCRYPT '89 Proceedings of the workshop on the theory and application of cryptographic techniques on Advances in cryptology
Design and implementation of the idemix anonymous credential system
Proceedings of the 9th ACM conference on Computer and communications security
An Efficient System for Non-transferable Anonymous Credentials with Optional Anonymity Revocation
EUROCRYPT '01 Proceedings of the International Conference on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
Enabling DRM-Preserving Digital Content Redistribution
CEC '05 Proceedings of the Seventh IEEE International Conference on E-Commerce Technology
Tor: the second-generation onion router
SSYM'04 Proceedings of the 13th conference on USENIX Security Symposium - Volume 13
The concept of decentralized and secure electronic marketplace
Electronic Commerce Research
Security proofs for signature schemes
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
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An increasing number of Internet traders exclusively sell digital products. These digital products can include media files, licenses, services, or subscriptions. We consider the concept of digital provenance in reseller chains. The goal of this work is to provide an honest customer with a guarantee on the origin and ownership history for a digital item even when the reseller they are dealing with is untrusted. We introduce a protocol called the Tagged Transaction protocol which uses a third party called the Tag Generation Centre (TGC) to provide a method for honest customers to check they are purchasing a legitimate item, anonymity for customers and resellers, a method for customers to resell items they have purchased to other customers, and verification of the TGC.