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دسته بندی:
رمزنگاری - Cryptography
سال انتشار:
2019
عنوان انگلیسی مقاله:
Reducing the communication complexity of quantum private database queries by subtle classical post-processing with relaxed quantum ability
ترجمه فارسی عنوان مقاله:
کاهش پیچیدگی ارتباطات نمایش داده های کوانتومی خصوصی توسط پردازش ظریف کلاسیک با توانایی کوانتومی آرام
منبع:
Sciencedirect - Elsevier - Computers & Security, 81 (2019) 15-24: doi:10:1016/j:cose:2018:08:012
نویسنده:
Yu-Guang Yang a , b , ∗, Xue-Pei Guo a , Gang Xu c , Xiu-Bo Chen c , Jian Li d , Yi-Hua Zhou a , Wei-Min Shi
چکیده انگلیسی:
Existing protocols for private database queries in the quantum context are classified into
two-dimensional protocols and d -dimensional ones. For the two-dimensional protocols, to
obtain a meaningful n-bit message from the database, the user Alice has to query n times
to get all the n bits. However, each query may leak Alice’s privacy once the server Bob obtains
the address she queried, since each queried bit contributes to the whole queried message.
Apparently, the longer the queried message is, the worse the user privacy becomes.
By contrast, the d -dimensional protocol allows the user to query a multi-bit block with
length no more than log d from the database via only one query. In this paper, we propose
a novel d -dimensional quantum protocol for private database query. In contrast to exist-
ing d -dimensional protocols, the proposed protocol allows the user to retrieve a message
of theoretically arbitrary length without the limitation of the dimension d by using a subtle
classical post-processing strategy. Furthermore, the server’s outcomes of measurement can
be irrelevant for the implementation of the protocol thus relaxing his/her quantum ability.
Finally, the security of the proposed protocol in the zero-error case has been proved in terms
of the user privacy and database security.
Keywords: Quantum cryptography | Quantum private query | Quantum key distribution | Efficiency | Flexibility | Database security | User privacy
قیمت: رایگان
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