| Presentation | 2007-09-07 Sender Authenticated Key Agreements Without Random Oracles Chifumi SATO, Takeshi OKAMOTO, Eiji OKAMOTO, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The purpose of this paper is to study sender authenticated key agreements by a third party, which uses the received parameters to verify the fact that a sender of a message knows his long-term private key. In particular, we shall propose a standard model for the protocol amongst three entities for the first time. The security of this protocol depends on the difficulty to solve two new problems related to one-way isomorphisms and the co-bilinear Diffie-Hellman problem on multiplicative cyclic groups. It is the first time that the security of a key agreement has been formally proved by using negligible probability, and we believe that our approach contributes to other areas in cryptography. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Authenticated key agreements / One-way functions / Co-bilinear Diffie-Hellman problems / Standard models |
| Paper # | ISEC2007-80 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2007/8/31(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Sender Authenticated Key Agreements Without Random Oracles |
| Sub Title (in English) | |
| Keyword(1) | Authenticated key agreements |
| Keyword(2) | One-way functions |
| Keyword(3) | Co-bilinear Diffie-Hellman problems |
| Keyword(4) | Standard models |
| 1st Author's Name | Chifumi SATO |
| 1st Author's Affiliation | C4 Technology, Inc.() |
| 2nd Author's Name | Takeshi OKAMOTO |
| 2nd Author's Affiliation | Laboratory of Cryptography and Information Security, University of Tsukuba |
| 3rd Author's Name | Eiji OKAMOTO |
| 3rd Author's Affiliation | Laboratory of Cryptography and Information Security, University of Tsukuba |
| Date | 2007-09-07 |
| Paper # | ISEC2007-80 |
| Volume (vol) | vol.107 |
| Number (no) | 209 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |