| Presentation | 1997/7/19 A Note on Key Escrow/Recovery systems Based on the Diffie-Hellman Key Establishing Scheme : An investigator's attack on the RecoverKey@SCIS97-2A and how to prevent it Shingo MIYAZAKI, Kouichi SAKURAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The system proposed in [Kanda and Takashima, SCIS97-2A (1997)] is a Key Recovery System based on Diffie-Hellman key establishing schem. It allows the agency to wiretap the target's communication and decipher the message enciphered, even if the target is a sender or a receiver, but is designed not to be able to do that for the messages communicated during the period non-accepted by the court. However we propose the attack which allows the agency to decipher the target's communication from the information obtained out of the previous low enforcement anytime. In this paper, we examine several settlements against the attack and discuss the security of each modified method. Moreover, we note on the efficiency of a law enforcement and the user's privacy in the key escrow/recovery system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | cryptography / key management / key escrow / key recovery / Diffie-Hellman Key Establishing |
| Paper # | ISEC97-26 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1997/7/19(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 | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Note on Key Escrow/Recovery systems Based on the Diffie-Hellman Key Establishing Scheme : An investigator's attack on the RecoverKey@SCIS97-2A and how to prevent it |
| Sub Title (in English) | |
| Keyword(1) | cryptography |
| Keyword(2) | key management |
| Keyword(3) | key escrow |
| Keyword(4) | key recovery |
| Keyword(5) | Diffie-Hellman Key Establishing |
| 1st Author's Name | Shingo MIYAZAKI |
| 1st Author's Affiliation | Department of Computer Science and Communication Engineering Kyushu University() |
| 2nd Author's Name | Kouichi SAKURAI |
| 2nd Author's Affiliation | Department of Computer Science and Communication Engineering Kyushu University |
| Date | 1997/7/19 |
| Paper # | ISEC97-26 |
| Volume (vol) | vol.97 |
| Number (no) | 182 |
| Page | pp.pp.- |
| #Pages | 10 |
| Date of Issue | |