论文标题
在八用户量子网络上实现安全匿名协议的实验
Experimental implementation of secure anonymous protocols on an eight-user quantum network
论文作者
论文摘要
网络通信中的匿名性对于许多隐私保护任务至关重要。仅安全的密钥分布就不足以进行高安全性通信，经常知道谁向谁传递信息以及何时也必须隐藏在对手身上。在这里，我们在实验中使用极化键入的光子对在8个用户全市范围的量子网络上进行了5个信息理论上的匿名协议。这些协议的核心是匿名广播，这是一个加密原始的原始广播，它允许一个用户在保持其身份匿名的同时透露一点点信息。对于$ n $用户的网络，协议保留发件人的匿名性，给定少于$ n-2 $的用户是不诚实的。这是超出标准QKD之外的真正多用户加密协议的最早实现。我们的匿名协议增强了没有信任节点的任何完全连接的量子密钥分布网络的功能。
Anonymity in networked communication is vital for many privacy-preserving tasks. Secure key distribution alone is insufficient for high-security communications, often knowing who transmits a message to whom and when must also be kept hidden from an adversary. Here we experimentally demonstrate 5 information-theoretically secure anonymity protocols on an 8 user city-wide quantum network using polarisation-entangled photon pairs. At the heart of these protocols is anonymous broadcasting, which is a cryptographic primitive that allows one user to reveal one bit of information while keeping her identity anonymous. For a network of $n$ users, the protocols retain anonymity for the sender, given less than $n-2$ users are dishonest. This is one of the earliest implementations of genuine multi-user cryptographic protocols beyond standard QKD. Our anonymous protocols enhance the functionality of any fully-connected Quantum Key Distribution network without trusted nodes.
