Untraceable off-line cash in wallet with observers
CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Improved privacy in wallets with observers
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
Revokable and versatile electronic money (extended abstract)
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Secure and Efficient Off-Line Digital Money (Extended Abstract)
ICALP '93 Proceedings of the 20th International Colloquium on Automata, Languages and Programming
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
Wallet Databases with Observers
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
Provably Secure Blind Signature Schemes
ASIACRYPT '96 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Mis-representation of Identities in E-cash Schemes and how to Prevent it
ASIACRYPT '96 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Anonymity Control in E-Cash Systems
FC '97 Proceedings of the First International Conference on Financial Cryptography
FC '98 Proceedings of the Second International Conference on Financial Cryptography
On the Security of ElGamal Based Encryption
PKC '98 Proceedings of the First International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
An Efficient Off-line Electronic Cash System Based On The Representation Problem.
An Efficient Off-line Electronic Cash System Based On The Representation Problem.
Security proofs for signature schemes
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
Anonymity Control in Multi-bank E-Cash System
INDOCRYPT '00 Proceedings of the First International Conference on Progress in Cryptology
Anonymous Fingerprinting with Direct Non-repudiation
ASIACRYPT '00 Proceedings of the 6th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Anonymous Investing: Hiding the Identities of Stockholders
FC '99 Proceedings of the Third International Conference on Financial Cryptography
Self-Escrowed Cash against User Blackmailing
FC '00 Proceedings of the 4th International Conference on Financial Cryptography
Money Conservation via Atomicity in Fair Off-Line E-Cash
ISW '99 Proceedings of the Second International Workshop on Information Security
Efficient Transferable Cash with Group Signatures
ISC '01 Proceedings of the 4th International Conference on Information Security
Decision Oracles are Equivalent to Matching Oracles
PKC '99 Proceedings of the Second International Workshop on Practice and Theory in Public Key Cryptography
Electronic Payments: Where Do We Go from Here?
Proceedings of the International Exhibition and Congress on Secure Networking - CQRE (Secure) '99
Advanced Permission-Role Relationship in Role-Based Access Control
ACISP '08 Proceedings of the 13th Australasian conference on Information Security and Privacy
Efficient Attributes for Anonymous Credentials
ACM Transactions on Information and System Security (TISSEC) - Special Issue on Computer and Communications Security
Recoverable and untraceable e-cash
EuroPKI'05 Proceedings of the Second European conference on Public Key Infrastructure
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Anonymous off-line electronic cash (e-cash) systems provide transactions that retain the anonymity of the payer, similar to physical cash exchanges, without requiring the issuing bank to be on-line at payment. Fair off-line e-cash extend this capability to allow a qualified third party (a "trustee") to revoke this anonymity under a warrant or other specified "suspicious" activity. Extensions for achieving fair off-line e-cash based on off-line e-cash require modularity to be applicable in general settings. Simplicity (for ease of understanding and implementation) and efficiency (for cost effectiveness) are of high importance, otherwise these generic extensions will be hard and costly to apply. Of course, security must also be guaranteed and understood, yet, to date, there have been no efficient systems that offer provable security. A system which is (1) provably secure based on well understood assumptions, (2) efficient and (3) conceptually easy, is typically "elegant." In this work we make a step towards elegant fair off-line e-cash system by proposing a system which is provably anonymous (i.e., secure for legitimate users) while its design is simple and its efficiency is similar to the most efficient systems to date. Security for the bank and shops is unchanged from the security of non-traceable e-cash. We also present ways to adapt the functionality of "fairness" into existing e-cash systems in a modular way, thus easing advancement and maintaining version compatibility; these extensions are also provably anonymous.