| Presentation | 2005-07-22 Improvement of the Security against Photon Number Splitting Attacks Yoshifumi NISHIDA, Hidenori KUWAKADO, Masakatu MORII, Hatsukazu TANAKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Since it is difficult for practical optical devices to output a single-photon pulse, a weak laser pulse is often substituted for it in implementations of a single-photon quantum key distribution protocol. It should be noted that the use of the weak laser pulse allows an adversary to eavesdrop communications by photon number splitting attacks. To improve the security against photon number splitting attacks, we propose a quantum key distribution protocol such that the probability that a sender chooses a base from two bases is not 1/2. It follows that the adversary can guess the chosen base with probability greater than 1/2. Hence, the choice with the unequal probability has not been used in single-photon quantum key distribution protocols. However, we show that the choice with the unequal probability is effective in improving the security against photon number splitting attacks and the guess attack in terms of the amount of transmitted bits for generating the key. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | photon number splitting attacks / quantum key distribution / weak laser pulse |
| Paper # | ISEC2005-56 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2005/7/15(1days) |
| Place (in Japanese) | (See Japanese page) |
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| 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) | Improvement of the Security against Photon Number Splitting Attacks |
| Sub Title (in English) | |
| Keyword(1) | photon number splitting attacks |
| Keyword(2) | quantum key distribution |
| Keyword(3) | weak laser pulse |
| 1st Author's Name | Yoshifumi NISHIDA |
| 1st Author's Affiliation | Graduate School of Sience and Technology, Kobe University() |
| 2nd Author's Name | Hidenori KUWAKADO |
| 2nd Author's Affiliation | Faculty of Engineering, Kobe University |
| 3rd Author's Name | Masakatu MORII |
| 3rd Author's Affiliation | Faculty of Engineering, Kobe University |
| 4th Author's Name | Hatsukazu TANAKA |
| 4th Author's Affiliation | Kobe Institute of Computing |
| Date | 2005-07-22 |
| Paper # | ISEC2005-56 |
| Volume (vol) | vol.105 |
| Number (no) | 194 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |