| Presentation | 2006-09-13 A Method of Shortening Tardos' Fingerprinting Code Length by Optimizing Parameters Taichi ISOGAI, Hirofumi MURATANI, Kenichiro FURUTA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | There is a technique called "fingerprinting" that user's IDs are embedded in digital contents to trace a traitor who distributes digital contents illegally. In fingerprinting scheme, a collusion attack that is to detect and change the differences between a content that his ID is embedded in and the another must be considered. To use a collusion secure code is a way to resist this attack, but this code has too long length to be used for practical use. Tardos show us a method of construction of a collusion secure code and a code length, but this code length is not shortest because some parameters are defined arbitrarily. We try to shorten the code length by generalize equations regarding these fixed parameter as variable ones, optimizing these parameters, evaluating the inequality exactly in a proving process of this code having robustness against a collusion attack, and evaluating numerically some inequalities that are difficult to evaluate exactly. We can show that in our method a code length of a collusion secure code can be constructed in not more than one fourth of Tardos' in the case of many colluders exist. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | fingerprinting / collusion attack / c-secure code |
| Paper # | ISEC2006-73 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2006/9/6(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) | A Method of Shortening Tardos' Fingerprinting Code Length by Optimizing Parameters |
| Sub Title (in English) | |
| Keyword(1) | fingerprinting |
| Keyword(2) | collusion attack |
| Keyword(3) | c-secure code |
| 1st Author's Name | Taichi ISOGAI |
| 1st Author's Affiliation | Corporate Research & Development Center Toshiba Corporation() |
| 2nd Author's Name | Hirofumi MURATANI |
| 2nd Author's Affiliation | Corporate Research & Development Center Toshiba Corporation |
| 3rd Author's Name | Kenichiro FURUTA |
| 3rd Author's Affiliation | Corporate Research & Development Center Toshiba Corporation |
| Date | 2006-09-13 |
| Paper # | ISEC2006-73 |
| Volume (vol) | vol.106 |
| Number (no) | 235 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |