2013 Fiscal Year Final Research Report
Study on the general physical cipher beyond the Shannon limit
| Project/Area Number |
24656245
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Communication/Network engineering
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| Research Institution | Tamagawa University |
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Principal Investigator |
FUTAMI FUMIO 玉川大学, 量子情報科学研究所, 准教授 (20417695)
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| Co-Investigator(Kenkyū-buntansha) |
SOHMA Masaki 玉川大学, 工学部, 教授 (70384716)
HIROTA Osamu 玉川大学, 量子情報科学研究所, 教授 (40114889)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 暗号のシャノン限界 / 物理暗号 |
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| Research Abstract |
The scheme of coherent pulse position modulation with phase mask is expected to be a concrete method of realization of the generalized wiretapped channel model (keyed communication in quantum noise) which provides the security beyond the Shannon limit of the cryptography. For realizing such a new idea, we have studied a scheme of Y-00 quantum stream cipher with phase mask and demonstrated a simple model for the phase mask modulation scheme. The phase mask is realized in the frequency domain by using optical devices such as the liquid-crystal spatial light modulators operating in the wavelength range of 1.5 micrometer suitable for the optical fiber communication. This result will give a great progress to realize whole scheme of Y-00 quantum stream cipher beyond the Shannon limit.
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