| Presentation | 2000/3/16 A Discrete Log Cryptosystem Using Graph Isomorphism Yutaka KAWADA, Eikoh CHIDA, Masahiro MAMBO, Hiroki SHIZUYA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The ElGamal cryptosystem is a cryptosystem based on the discrete logarithm problem over a finite field. In terms of the class of computational complexity, the discrete logarithm problem belongs to NP∩co-NP. One of problems belonging to a higher class NP∩co-AM is the graph isomorphism problem. Because of the difference of the class, a cryptosystem using the graph isomorphism is expected to be stronger than that based on the discrete logarithm problem over a finite field. There are not much cryptosystems using the graph isomorphism except the scheme in [5]. Therefore, we propose an ElGamal-type cryptosystem using graph isomorphism and analyze its security by the approach of computational complexity theory. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Graph isomorphism / Discrete logarithm / ElGamal cryptosystem / Reduction |
| Paper # | IT99-79,ISEC99-118,SST99-127 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2000/3/16(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 Discrete Log Cryptosystem Using Graph Isomorphism |
| Sub Title (in English) | |
| Keyword(1) | Graph isomorphism |
| Keyword(2) | Discrete logarithm |
| Keyword(3) | ElGamal cryptosystem |
| Keyword(4) | Reduction |
| 1st Author's Name | Yutaka KAWADA |
| 1st Author's Affiliation | Department of Computer and Mathematical Sciences, Graduate School of Information Sciences, Tohoku University() |
| 2nd Author's Name | Eikoh CHIDA |
| 2nd Author's Affiliation | Department of Computer and Mathematical Sciences, Graduate School of Information Sciences, Tohoku University |
| 3rd Author's Name | Masahiro MAMBO |
| 3rd Author's Affiliation | Department of Computer and Mathematical Sciences, Graduate School of Information Sciences, Tohoku University |
| 4th Author's Name | Hiroki SHIZUYA |
| 4th Author's Affiliation | Department of Computer and Mathematical Sciences, Graduate School of Information Sciences, Tohoku University |
| Date | 2000/3/16 |
| Paper # | IT99-79,ISEC99-118,SST99-127 |
| Volume (vol) | vol.99 |
| Number (no) | 701 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |