J. Stern and S. Vaudenay. SVP: a flexible micropayment scheme. In Financial Cryptography '97 Proceedings, pp. 161-71, Lecture Notes in Computer Science vol. 1318. Springer-Verlag, Berlin, 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....of a single bank secret (K B ) within tamper resistant user or vendor devices. If the bank secret is ever discovered then the security of the system is broken and unlimited spending is possible without being distinguishable from genuine spending. In Stern and Vaudenay s Small Value Payments (SVP) [SV97] scheme, the secret broker key (K B ) is present in all vendor s tamper resistant devices. Users withdraw a token, which is certified with a keyed hash of K B . A shared user broker secret protects all communication between them. Since the token is verified with a broker key, it is similar to ....

J. Stern and S. Vaudenay. SVP: a flexible micropayment scheme. In Financial Cryptography '97 Proceedings, pp. 161-71, Lecture Notes in Computer Science vol. 1318. Springer-Verlag, Berlin, 1997.

....Chaum, Fiat and Naor ( 7] also see [9] research contributions have tended either to introduce new features into existing payment paradigms or to address stronger attack models. Among the new features recently introduced are o line payments [2, 3, 14] divisibility [27, 20] and micro payments [17, 18, 23, 25, 28, 33]. Examples of stronger attack models or improved protection against attacks include tamper resistance [10] provable security against forgery [24] fairness [19] probabilistic on line veri cation [23, 37] and revocable anonymity [4, 5, 6, 12, 15, 16, 20, 21, 22, 26, 30, 31, 32, 34, 36] In all ....

J. Stern and S. Vaudenay, "SVP: a Flexible Micropayment Scheme," Advances in Cryptology - Proceedings of Financial Cryptography '97, pp. 161-171.

....Chaum, Fiat and Naor ( 7] also see [9] research contributions have tended either to introduce new features into existing payment paradigms or to address stronger attack models. Among the new features recently introduced are off line payments [2, 3, 14] divisibility [27, 20] and micro payments [17, 18, 23, 25, 28, 33]. Examples of stronger attack models or improved protection against attacks include tamper resistance [10] provable security against forgery [24] fairness [19] probabilistic on line verification [23, 37] and revocable anonymity [4, 5, 6, 12, 15, 16, 20, 21, 22, 26, 30, 31, 32, 34, 36] In all ....

J. Stern and S. Vaudenay, "SVP: a Flexible Micropayment Scheme," Advances in Cryptology - Proceedings of Financial Cryptography '97, pp. 161--171.

.... flexibility and convertibility requirements put forth in [61] Our system is easily extendible to include practical functions like coin divisibility (the ability to spend any fraction of a coin and save the rest for later payments, check payments, credit card payments, micropayments (e.g. [42, 52, 53, 71, 80]) and a fair exchange [46] ensuring that neither the payer nor the payee cheats each other) Similarly, we can allow certain coins to be eligible for deposit only after certain triggering events have occurred (e.g. implementing surety bonds [54] These expansions in terms of functionality are ....

J. Stern and S. Vaudenay, "SVP: a Flexible Micropayment Scheme," Advances in Cryptology - Proceedings of Financial Cryptography '97.

....each coin to be stored by its owner. Moreover, our scheme is contrasted to Simon s, which, by not using signatures, limits computational costs, but at the same time also reduces the functionality of the resulting scheme. Technically, our work bears some resemblance to micro payment schemes (e.g. [20, 21, 29, 35]) These allow a user to spend a coin representation in small steps by sending the merchant transcripts that are computed as incremental hashes of a seed. Similarly, we maintain low storage costs for user devices by letting these store only a seed and counters, from which payment transcripts can ....

J. Stern and S. Vaudenay, "SVP: a Flexible Micropayment Scheme," Advances in Cryptology - Proceedings of Financial Cryptography '97. 14

....authorisation for each payment may not be economical. micropayment systems: These systems are designed to support payments in environments were users wish to make low value payments. Recently, many micropayment protocols have D16: Secure Billing Evaluation Report Page 13 of 42 been suggested [PayW, ikP, Netc, Pede, SVP, Payt, Mill, Netb]. The first four of these rely on the same cryptographic mechanism which was first proposed for payment applications in [Pede] but was proposed for use in authentication schemes earlier in [Lamp] There, a signature value generated using a public key operation is spread over many other ....

Stern J, Vaudenay S, SVP a flexible micropayment scheme, To appear in the proceedings of the Financial Cryptography '97 Conference. http://www.dmi.ens.fr/~vaudenay/

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