| Presentation | 2006-11-16 Cost Reduction Techniques for the Improved PayWord Micropayment Scheme Mitsuyoshi KAGA, Masahiro MAMBO, Eiji OKAMOTO, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Adachi et.al pointed out security problems, including a customer certificate abuse attack, of the well-known micropayment scheme PayWord and constructed unimproved scheme solving them. In their improved PayWord, the customer certificate abuse attack is prevented by demanding an online credit check between shop and bank at the beginning of the transaction between customer and shop. Since the shop is not required to verify user's signature during the online credit check, we propose a new scheme with reduced operational cost by substituting MAC for a signature certifying a hash chain and by incorporating other mechanisms. Our analysis shows that the proposed scheme reduces the operational cost without degrading its security. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Micropayment / PayWord / Hash Chain / Digital Signature / MAC |
| Paper # | ISEC2006-92,OIS2006-50 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2006/11/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Cost Reduction Techniques for the Improved PayWord Micropayment Scheme |
| Sub Title (in English) | |
| Keyword(1) | Micropayment |
| Keyword(2) | PayWord |
| Keyword(3) | Hash Chain |
| Keyword(4) | Digital Signature |
| Keyword(5) | MAC |
| 1st Author's Name | Mitsuyoshi KAGA |
| 1st Author's Affiliation | Graduate School of SIE, University of Tsukuba() |
| 2nd Author's Name | Masahiro MAMBO |
| 2nd Author's Affiliation | Graduate School of SIE, University of Tsukuba |
| 3rd Author's Name | Eiji OKAMOTO |
| 3rd Author's Affiliation | Graduate School of SIE, University of Tsukuba |
| Date | 2006-11-16 |
| Paper # | ISEC2006-92,OIS2006-50 |
| Volume (vol) | vol.106 |
| Number (no) | 351 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |