ANR - Fundamental research in quantum networks and cryptography

在一个日益连接和全球化的世界中，安全的概念是必不可少的，因此密码学成为一个非常重要的研究领域。在过去的二十年里，人们已经提出并成功证明，依赖于量子物理基本定律的密码系统可以确保传输消息的保密性，与经典密码系统相比，它提供了前所未有的安全性。然而，这一领域的研究主要集中在单个点对点链路上，其在范围和用户连接性方面的性能固有地受到传输介质和所实现的协议的性质的限制。随着量子密码网络的出现，这些限制可以被克服。因此，现在有必要从基础和实践的角度研究这种网络，并探索这些网络可以提供的新功能。

In an increasingly connected and globalized world, the notion of security is an imperative, therefore making cryptography a very important research field. In the past two decades, it has been suggested and successfully demonstrated that cryptographic systems that rely on the fundamental laws of quantum physics to ensure the secrecy of transmitted messages offer unprecedented levels of security compared to classical cryptosystems. Research in this field, however, has mainly focused on individual point-to-point links, whose performance in terms of range and user connectivity is inherently limited by the nature of the transmission medium and the implemented protocols. These limitations can be overcome with the advent of quantum cryptography networks. It is therefore now essential to study such networks from both a fundamental and practical point of view, and explore the new capabilities that these networks can offer.