Zero-knowledge undeniable signatures (extended abstract)
EUROCRYPT '90 Proceedings of the workshop on the theory and application of cryptographic techniques on Advances in cryptology
On blind signatures and perfect crimes
Computers and Security
Revokable and versatile electronic money (extended abstract)
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Optimistic protocols for fair exchange
Proceedings of the 4th ACM conference on Computer and communications security
The risks of key recovery, key escrow, and trusted third-party encryption
World Wide Web Journal - Special issue: Web security: a matter of trust
Efficient scalable fair cash with off-line extortion prevention
ICICS '97 Proceedings of the First International Conference on Information and Communication Security
SAC '98 Proceedings of the Selected Areas in Cryptography
Digital Payment Systems with Passive Anonymity-Revoking Trustees
ESORICS '96 Proceedings of the 4th European Symposium on Research in Computer Security: Computer Security
CRYPTO '88 Proceedings of the 8th Annual International Cryptology Conference on Advances in Cryptology
Provably Secure and Practical Identification Schemes and Corresponding Signature Schemes
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
"Indirect Discourse Proof": Achieving Efficient Fair Off-Line E-cash
ASIACRYPT '96 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Security Aspects of the Ecash Payment System
State of the Art in Applied Cryptography, Course on Computer Security and Industrial Cryptography - Revised Lectures
Anonymity Control in E-Cash Systems
FC '97 Proceedings of the First International Conference on Financial Cryptography
Mini-Cash: A Minimalistic Approach to E-Commerce
PKC '99 Proceedings of the Second International Workshop on Practice and Theory in Public Key Cryptography
Marking: A Privacy Protecting Approach Against Blackmailing
PKC '01 Proceedings of the 4th International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
CRYPTO '89 Proceedings of the 9th Annual International Cryptology Conference on Advances in Cryptology
Designated verifier proofs and their applications
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
EUROCRYPT'95 Proceedings of the 14th annual international conference on Theory and application of cryptographic techniques
A New Offline Privacy Protecting E-cash System with Revokable Anonymity
ISC '02 Proceedings of the 5th International Conference on Information Security
Offline payments with auditable tracing
FC'02 Proceedings of the 6th international conference on Financial cryptography
Balancing accountability and privacy using e-cash (extended abstract)
SCN'06 Proceedings of the 5th international conference on Security and Cryptography for Networks
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We present an electronic payment system offering a new kind of tracing mechanism. This mechanism is optimistic fair, as any misuse of the tracing mechanism is prevented by using an audit concept so that a violation of privacy can be detected and will be prosecuted. Thus, compared to previously proposed tracing methods our optimistic fair tracing approach offers more privacy for customers and does not need any trusted third parties, which simplifies the infrastructure of the payment system. Our payment system is able to defend against blackmailing, kidnapping, and bank robberies and can also be used to support investigations of money laundering and illegal purchases.