Presentation | 2002/3/12 Secret Function Sharing Systems for Multi-Groups and their Application to Oblivious Transfers Yohei KAWAMOTO, Hirosuke YAMAMOTO, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | Distributed oblivious transfer is proposed by Naor-Pinkas, but this system is weak against chooser-server collusion attacks. We propose a new scheme of the 1-out-of-l oblivious transfer which is robust for the collusion attacks. The new scheme is constructed by combining two methods, secret function sharing systems for multi-groups and ramp threshold schemes. The former is an extension of Koyama's cryptographic key sharing methods for multi-groups, it strengthens the robustness for the collusion attacks. The latter contributes to efficiency of coding rate. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | secret sharing system / secret sharing system for functions / oblivious transfer |
Paper # | ISEC2001-122 |
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Committee | ISEC |
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Conference Date | 2002/3/12(1days) |
Place (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) | Secret Function Sharing Systems for Multi-Groups and their Application to Oblivious Transfers |
Sub Title (in English) | |
Keyword(1) | secret sharing system |
Keyword(2) | secret sharing system for functions |
Keyword(3) | oblivious transfer |
1st Author's Name | Yohei KAWAMOTO |
1st Author's Affiliation | Department of Mathematical Engineering and Information Physics, University of Tokyo() |
2nd Author's Name | Hirosuke YAMAMOTO |
2nd Author's Affiliation | Department of Mathematical Engineering and Information Physics, University of Tokyo |
Date | 2002/3/12 |
Paper # | ISEC2001-122 |
Volume (vol) | vol.101 |
Number (no) | 728 |
Page | pp.pp.- |
#Pages | 6 |
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