Weak randomness seriously limits the security of quantum key distribution

• Autoři: BOUDA Jan; PIVOLUSKA Matej; PLESCH Martin; WILMOTT Colin
• Rok publikování: 2012
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Physical Review A
• Fakulta / Pracoviště MU: Fakulta informatiky
• www: http://link.aps.org/doi/10.1103/PhysRevA.86.062308
• Doi: http://dx.doi.org/10.1103/PhysRevA.86.062308
• Obor: Informatika
• Klíčová slova: weak randomness; quantum key distribution
• Popis: In usual security proofs of quantum protocols the adversary (Eve) is expected to have full control over any quantum communication between any communicating parties (Alice and Bob). Eve is also expected to have full access to an authenticated classical channel between Alice and Bob. Unconditional security against any attack by Eve can be proved even in the realistic setting of device and channel imperfection. In this paper we show that the security of quantum key distribution protocols is ruined if one allows Eve to possess a very limited access to the random sources used by Alice. Such knowledge should always be expected in realistic experimental conditions via different side channels.

Související projekty

• Matematické a inženýrské metody pro vývoj spolehlivých a bezpečných paralelních a distribuovaných počítačových systémů
• Rozsáhlé výpočetní systémy: modely, aplikace a verifikace
• Weak sources of entanglement and randomness
• Centrum excelence - Institut teoretické informatiky