Steve Glassman, Mark Manasse, Martn Abadi, Paul Gauthier, and Patrick Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In Fourth International World Wide Web Conference, 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....on a link in the delivered page, the user typically loads the selected web page in a standard web browser window and can use all functionality available from web sites, including support for electronic payment. Most current electronic micro payment and macropayment systems, such as Millicent [54] or SET [151, 152, 153, 154] are targeted at web sites. Thus feasible infrastructures are already available and await large scale deployment with web servers. Another security related problem described in Section 3.2.1 is alleviated by this setting: Forging the sender s email address has less ....

....is complicated and not always possible. Thus Minstrel is designed to support e commerce from its initial stage and to provide support for various payment methods and business models. As a proof of concept, Minstrel supports a pay per view business model using the Millicent micro payment protocol [54] (see Section 6.2) as the payment method. Executable content. Minstrel supports the dissemination of executable content that is intended for execution at the receiver (pushlets) Pushlets are Java [4] applications that run inside a secure execution environment to protect the receiver from ....

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. Fourth International World Wide Web Conference (Boston, Massachusetts, USA). Published as World Wide Web Journal, 1(1). O'Reilly & Associates, Incorporated, November 1995. http://www.w3.org/Conferences/WWW4/ Papers/246/.

....from one proxy server or gatekeeper to another, with the aggregate record presented for billing or collection at call completion by one of the servers, e.g. the caller s proxy server. As an alternative, electronic payment protocols suited for low value transactions, such as the Millicent protocol [22], may be more appropriate for telephone services. Information for these protocols can be carried as part of a multipart sip id MIME type in SIP [23] legacy database PSTN AAA policy server SIP server policy client IT gateway SIP cgi AAA and policy msg. SIP Figure 4: Billing in a ....

S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro, "The millicent protocol for inexpensive electronic commerce," World Wide Web Journal, pp. 603--618, Dec. 1995. Fourth International World Wide Web Conference Proceedings.

....hold an account with the node provider; this account would be debited directly with any usage charges. A credit card account (or some equivalent) could be supplied at session creation time the node provider could make charges to this account. A digital payment scheme such as Millicent [Glassman95] could be employed. In such a scheme, cryptographically signed money certificates may be issued to end users through the services of a broker, and presented to the node provider as payment for resource consumption. For the reasons to be outlined in Section 5.7.2.2, digital cash that can be traced ....

Steve Glassman, Mark Manasse, Martin Abadi, Paul Gauthier, and Patrick Sobalvarro. The Millicent protocol for inexpensive electronic commerce. World Wide Web Journal, 1(1), December 1995. (p 89)

....informally, and motivated, below; they would be formalized via an LGI law in Section 4. The Cash Handling (CH) Policy: Given the possibly small size of payments for services, the use of traditional kind of e cash certificates is not practical. Because, as has been pointed out by Glassman et al. [13], each such certificate would have to be validated by the issuing bank, whenever used, for fear of duplication. This is far too expensive for small payments. We would like, therefore, payments to be carried out just like cash payment in the physical world. This should be possible if the following ....

....taken from one s physical wallet. 4 3. When a payment is obtained by server y, it is to be added to its electronic wallet; and can then be used by orders made by y, or for depositing in y s bank account. This policy would be an improvement over the Millicent protocol devised by Glassman et al. [13] for a similar purpose. Under the Millicent protocol clients use vendor signed scrips for payments. Such scrips are copyable, and thus needs to be validated by the vendor, for every query, which requires a centralized database of valid scrips. Moreover, the vendor has to send a new scrip to the ....

S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent protocol for inexpensive electronic commerce. In Fourth International World Wide Web Conference Proceedings, pages 603--618, December 1995.

.... her his credit card information which is then transmitted to the vendor s site via Secure Socket Layer (SSL) 8] Only very few sites o#er electronic payment via a payment protocol such as Secure Electronic Transaction (SET) 40] Even fewer sites employ micro payment protocols such as Millicent [14]. However, electronic payment is important for e commerce applications because it enables highly relevant new business models. For example, pay per view business models are only possible with electronic payment instruments. Assuming that electronic payment will be employed on a large scale in the ....

....model and the cryptographic mechanisms used are discussed in Chapter 4. Chapter 5 analysis the Minstrel push system which is used as case study for the application of our generalized payment model. The prototype implementation, which covers the Minstrel payment framework and the Millicent [14] micro payment protocol is documented in Chapter 6. Chapter 7 documents several general purpose Java packages which were introduced during implementation of this thesis to facilitate decomposition and reuse. Topics covered are: HTTP client and server, semi automatic user interface generation ....

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The millicent protocol for inexpensive electronic commerce. volume 1. OREIL., 1995. http://www. w3.org/Conferences/WWW4/Papers/246/.

....Other protocols, called digital cash protocols, are tailored to small purchases in microcommerce applications. Thus, they are useful in facilitating the selling of content, such as web pages, over the Internet. Examples of digital cash protocols are PayWord and MicroMint [12] Compaq s Millicent [2][9] and IBM s Micropayments [5] These protocols need to be regarded as secure before they can win the approval of customers and vendors alike. In spite of this, none of these protocols have been formally specified and verified. In this paper, we address this issue by formally specifying ....

....to the above definitions, every protocol satisfies the closure condition. Thus, to prove that a protocol is secure, it is sufficient to show that the protocol satisfies both the convergence and protection conditions. See sections 5, 7, and 9 below. 4 4 Specification of Millicent In Millicent [2][9] there are two types of parties, customers and vendors. Each customer has a scrip from each vendor and can use this scrip over a period of time to purchase content from that vendor. Thus, each scrip is both customer specific and vendor specific, and has the following fields: identity of the ....

S. Glassman, M. S. Manasse, M. Abadi, P. Gauthier, P. Sobalvarro, "The MilliCent Protocol for Inexpensive Electronic Commerce", Fourth International World Wide Web Conference, Dec. 1995.

....in any previous clearing of the same value instruction. Freshness is ensured by the timestamp t in the ticket. The bank will not accept a re used value instruction unless it is linked to a fresh ticket. The reader will notice that a re used value instruction plus its ticket resemble a Millicent [7] piece of scrip and require a similar amount of processing. The advantage of our scheme over Millicent is that tickets are only required for reused value instructions, which are typically a (small) fraction of the total number of instructions. Note 8 (On clearing tickets) Clearing tickets one by ....

S. Glassman, M. Manasse, M. Abadi, P. Gauthier and P. Sobalvarro, \The Millicent protocol for inexpensive electronic commerce", in World Wide Web Journal, Fourth International World Wide Web Conference Proceedings, O'Reilly, 1995, pp. 603-618.

....scenarios The payment authorization core of the ZiP implementation is formed by the 2KP and 3KP protocols described in the previous section. Additional functionality was added during the implementation phase following the requests of 5Note that most other micro payment protocols such as Millicent [23] and NetBill [24] gain their efficiency through the use of shared key cryptosystems and therefore require complete trust in the payment system provider. the target user community. The actual ZiP protocol suite includes four protocol scenarios: 1. Payment Authorization (2KP and 3KP augmented with ....

Steve Glassman, Mark Manasse, Martin Abadi, Paul Gauthier, and Patrick Sobalvarro, "The millicent protocol for inexpensive electronic commerce," in Fourth International Conference on the World-Wide Web, MIT, Boston, Dec. 1995.

....the value of the relationship. The possible savings in computation time may become smaller than the added risks and operational costs due to dispute resolution and customer support. Proposals for micropayment systems using MAC instead of digital signatures include NetBill [CTS95] and MilliCent [M95, GM 95]. Use public key signature algorithm that is substantially more efficient than [RSA] or [DSA] There were several proposals of significantly more efficient public key signature schemes, e.g. S93] However, none of these schemes has yet gained sufficient adoption, and the amount of ....

Steve Glassman, Mark Manasse, Martin Abadi, Paul Gauthier, and Patrick Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In World Wide Web Journal, Fourth International World Wide Web Conference Proceedings, pages 603-618. O'Reilly, December 1995.

....can make revenue from the low value transactions. To support various business models (pay per view, volume based, time based, etc. in Minstrel we have developed a flexible payment framework. As a proof of concept of this framework we have implemented a pay per view pay model using the Millicent [7, 16] micro payment protocol [29] Millicent targets small value transaction, is scalable, anonymous and secure. For purchases Millicent uses electronic tokens, so called scrip, and it guarantees that scrip cannot be tampered with, stolen or spent multiple times. On the Internet, scrip can represent ....

..... 67 iv CONTENTS List of Figures 3.1 The Millicent payment model [19] 16 3.2 Scrip structure . 17 3. 3 Master Scrip Secret and Certificate [16] . 18 3.4 Re computation and check of certificate [16] 20 3.5 Customer Secret and Master Customer Secret [16] 21 3.6 Secure without encryption [16] ....

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Steve Glassman, Mark Manasse, Martin Abadi, Paul Gauthier, and Patrick Sobalvarro. The Millicent Protocol for inexpensive Electronic Commerce. In Fourth International World Wide Web Proceedings, volume 1, pages 603--618. O'Reilly & Associates, Inc., 1995. http://www.w3.org/Conferences/WWW4/Papers/246/.

....all gain or loss may not offset the advantages. We study a number of optimisations to an electronic payment system, ranging from a provably correct, lossless optimisation to efficient but lossy optimisations. Most micro payment systems involve three parties: brokers, merchants and customers [2, 5, 8]. The role of the broker is to exchange real money for tokens. The broker provides services to the customers and the merchants and as such should be the most trusted party of the system. The merchant delivers services or goods to the customer in exchange for tokens and as such should be trusted ....

....and transmitting a sequence of random numbers can be relatively inefficient. However, this is only done during registration; during payment transactions only a single random number is transferred in clear. Systems that use cryptographic computations during every transaction, such as Millicent [2] and Mini Pay [5] are inherently less efficient than QuickPay but possibly more secure. Micro payment systems raise a number of interesting questions because they differ from normal payment systems. The present paper makes the following contributions to the understanding of micro payment systems ....

S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. G. Sobalvarro. The millicent protocol for inexpensive electronic commerce. In 4th International World Wide Web Conf., pages 603--618, Boston, Massachusetts, Dec 1995. World Wide Web Journal. www.research.digital.com/ SRC/ staff/ msm/ bio.html.

....the example simple we do not describe here the case when the vendor declines a PO If the client cancelled in time then, by Rule L12 the virtual agent is removed. 13 enterprises. What is new about this concept of virtual agent, relative to the conventional concept of a trusted intermediary [4, 6, 10], is (a) its dynamic and ephemeral nature, which contributes to scalability; and (b) while operating under the contract law, a virtual agent interoperates with agents operating under the laws of the individual enterprises. Due to lack of space we were not able to deal in this paper with a ....

S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent protocol for inexpensive electronic commerce. In Fourth International World Wide Web Conference Proceedings, pages 603--618, December 1995.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent protocol for inexpensive electronic commerce, December 1995.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent protocol for inexpensive electronic commerce, December 1995.

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Steve Glassman, Mark Manasse, Martn Abadi, Paul Gauthier, and Patrick Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In Fourth International World Wide Web Conference, 1995.

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Glassman, S., Manasse, M., Abadi, M., Gauthier, P., and Sobalvarro, P. The MilliCent protocol for inexpensive electronic commerce. In Fourth International Conference on the World-Wide-Web (MIT, Boston, 1995).

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The MilliCent protocol for inexpensive electronic commerce. In Fourth International Conference on the World-Wide-Web, pages 603--618, MIT, Boston, Dec. 1995. O'Reilly.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In Fourth International World Wide Web Conference, Dec. 1995.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The millicent protocol for inexpensive electronic commerce. World Wide Web Journal, Fourth International World Wide Web Conference Proceedings, 1(1):603--618, 1996.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier and P. Sobalvarro, "The Millicent protocol for inexpensive electronic commerce", in World Wide Web Journal, Fourth International World Wide Web Conference Proceedings, O'Reilly, 1995, pp. 603-618.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In Fourth International World Wide Web Conference, Dec. 1995.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent protocol for inexpensive electronic commerce. In the Proceedings of the 4 th International World Wide Web Conference, pp 603-618, December 1995. 11

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The millicent protocol for inexpensive electronic commerce. In Proc. 4th International World Wide Web Conference, 1995. http://www.research.digital.com/SRC/millicent.

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. Sobalvarro. The Millicent Protocol for Inexpensive Electronic Commerce. In Fourth International World Wide Web Conference, Boston, Massachusetts, USA. O'Reilly, Nov. 1995. http: //www.w3.org/Conferences/WWW4/Papers/246/. 14

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S. Glassman, M. Manasse, M. Abadi, P. Gauthier, and P. G. Sobalvarro. The millicent protocol for inexpensive electronic commerce. In 4th International World Wide Web Conf., pages 603--

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