Device-independent security of quantum cryptography against collective attacks.
نویسندگان
چکیده
We present the optimal collective attack on a quantum key distribution protocol in the "device-independent" security scenario, where no assumptions are made about the way the quantum key distribution devices work or on what quantum system they operate. Our main result is a tight bound on the Holevo information between one of the authorized parties and the eavesdropper, as a function of the amount of violation of a Bell-type inequality.
منابع مشابه
Bounds on Information and the Security of Quantum Cryptography
We present new physical bounds on quantum information, and use them to prove the security of quantum cryptography against a large class of collective attacks. Such attacks are directed against the final key, and security against them suggests that quantum cryptography is ultimately secure.
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عنوان ژورنال:
- Physical review letters
دوره 98 23 شماره
صفحات -
تاریخ انتشار 2007