ANR - Fundamental research in quantum networks and cryptography

在一个日益联系和全球化的世界中，安全的概念势在必行，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，有人提出并成功地证明，与经典密码系统相比，依靠量子物理的基本定律来确保传输消息的保密性的密码系统提供了前所未有的安全性。然而，该领域的研究主要集中在单个点对点链路上，其性能在范围和用户连通性方面受到传输介质性质和实现协议的固有限制。随着量子加密网络的出现，这些限制可以被克服。因此，现在有必要从基础和实用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.