论文标题
在测量设备独立环境中的位承诺和遗忘转移
On Bit Commitment and Oblivious Transfer in Measurement-Device Independent settings
论文作者
论文摘要
在量子密码学中研究最多的任务中，可以找到比特承诺（BC）和遗忘转移（OT），这是两个中央密码原始人。在本文中，我们在测量设备独立（MDI）设置中首次针对这些任务的协议提议并分析其安全性。我们分析了两种不同的情况：首先，我们假设当事方可以访问完美的单个光子源（但仍存在噪声和损失），其次，我们假设它们只有不完善的单光子源。在第一种情况下，我们为BC和OT提出了一个协议，并在嘈杂的量子存储模型中证明了它们的安全性。有趣的是，如果诚实的当事方无法访问完美的单个光子源，我们发现仍然有可能获得卑诗省，但是获得ot的安全协议“更困难”：我们表明，有一系列不能安全的协议。我们所有的安全分析都是在有限的圆形制度中进行的。
Among the most studied tasks in Quantum Cryptography one can find Bit Commitment (BC) and Oblivious Transfer (OT), two central cryptographic primitives. In this paper we propose for the first time protocols for these tasks in the measurement-device independent (MDI) settings and analyze their security. We analyze two different cases: first we assume the parties have access to perfect single photon sources (but still in the presence of noise and losses), and second we assume that they only have imperfect single photon sources. In the first case we propose a protocol for both BC and OT and prove their security in the Noisy Quantum Storage model. Interestingly, in the case where honest parties do not have access to perfect single photon sources, we find that BC is still possible, but that it is "more difficult" to get a secure protocol for OT: We show that there is a whole class of protocols that cannot be secure. All our security analyses are done in the finite round regime.
