arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1012.3878quant-phcs.CR
收藏

设备无关的量子密钥分发

Device-independent quantum key distribution

Esther Hänggi

摘要:

在本论文中,我们研究了两种实现设备无关的量子密钥分发的方法:在第一种方法中,对手可以将任何系统分发给不能用于他们三个之间通信的诚实方,即,它必须是无信号的。在第二种方法中,我们将对手限制在可以使用量子物理实现的策略上。对于这两种方法,我们展示了如何设备无关的量子密钥分发时,可以实现一个附加的条件。在非信令的情况下,这个额外的要求是,通信是不可能的所有成对的子系统之间的诚实的当事人,而在量子的情况下,我们要求不同的子系统上的测量必须交换。我们给出了一个通用的安全性证明设备无关的量子密钥分发在这些情况下,并将其应用到现有的量子密钥分发协议,从而证明其安全性,即使在这种设置。我们还表明,在没有任何额外限制的情况下,总是存在无信号对手的成功联合攻击。

英文摘要:

In this thesis, we study two approaches to achieve device-independent quantum key distribution: in the first approach, the adversary can distribute any system to the honest parties that cannot be used to communicate between the three of them, i.e., it must be non-signalling. In the second approach, we limit the adversary to strategies which can be implemented using quantum physics. For both approaches, we show how device-independent quantum key distribution can be achieved when imposing an additional condition. In the non-signalling case this additional requirement is that communication is impossible between all pairwise subsystems of the honest parties, while, in the quantum case, we demand that measurements on different subsystems must commute. We give a generic security proof for device-independent quantum key distribution in these cases and apply it to an existing quantum key distribution protocol, thus proving its security even in this setting. We also show that, without any additional such restriction there always exists a successful joint attack by a non-signalling adversary.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑