| Presentation | 1993/5/14 On the considerations to a collusion problem of a new type of ID- based key sharing system with different encryption and decryption keys Shigeo Tsujii, Kazuo Tanada, Kiyomichi Araki, Toshiaki Hasumi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper,we consider a collusion problem of a new type of ID-based key sharing system which makes use of two different encryption and decryption keys,and is proposed by H.Tanaka recently.Firstly,we show that the Carmichael function of which obscurity should guarantee a safety of the system can be revealed by an extended loop attack,as well as a method making use of symmetry and unsymmetry of entity′s secret matrix.Next,a collusion equation for the important secret parameters of the system can be shown to be formulated in a power-product form.Finally,we point out that there is a gap between computation complexities in a normal key generation and a revelation of secret parameters. Consequently,the Tanaka′s system may be applicable to a network co nnecting with high speed computers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cryptology / key management / ID-based key sharing system |
| Paper # | ISEC93-6 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1993/5/14(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) | On the considerations to a collusion problem of a new type of ID- based key sharing system with different encryption and decryption keys |
| Sub Title (in English) | |
| Keyword(1) | Cryptology |
| Keyword(2) | key management |
| Keyword(3) | ID-based key sharing system |
| 1st Author's Name | Shigeo Tsujii |
| 1st Author's Affiliation | Department of Electrical and Electronic Engineering,Faculty of Engineering,Tokyo Institute of Technology() |
| 2nd Author's Name | Kazuo Tanada |
| 2nd Author's Affiliation | Department of Electrical and Electronic Engineering,Faculty of Engineering,Tokyo Institute of Technology |
| 3rd Author's Name | Kiyomichi Araki |
| 3rd Author's Affiliation | Department of Electrical and Electronic Engineering,Faculty of Engineering,Saitama University |
| 4th Author's Name | Toshiaki Hasumi |
| 4th Author's Affiliation | Department of Electrical and Electronic Engineering,Faculty of Engineering,Saitama University |
| Date | 1993/5/14 |
| Paper # | ISEC93-6 |
| Volume (vol) | vol.93 |
| Number (no) | 24 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |