Study of hardware vulnerability in continuous variable quantum communication

随着互联网的兴起，加密的重要性越来越大。不幸的是，传统的加密方案通常基于未经证实的计算假设，这可能会被大规模量子计算机的构建所违反。 与传统的密码学不同，量子密钥分发提供了基于物理定律的无条件安全性。连续变量量子密钥分配具有潜在的优势，即每个信号产生多于一位的密钥，并利用光通信中的标准检测方案。* 尽管如此，连续变量量子密钥分发的安全性分析已经落后于其离散变量表亲。这一建议将使我们能够显着提高连续变量量子密钥分发协议的安全性分析。我们这样做，利用和推广的离散变量量子密钥分配的情况下，连续变量的许多技术。我们的工作将为连续变量量子密钥分配的广泛应用铺平道路。它将加强加拿大在量子密钥分配安全研究中的领导地位。

With the rise of the Internet, the importance of encryption is growing. Unfortunately, conventional encryption schemes are often based on unproven computational assumptions, which may be violated by the construction of a large-scale quantum computer. Unlike conventional cryptography, quantum key distribution offers unconditional security based on the laws of physics. Continuous variable quantum key distribution has the potential advantages of producing more than one bit of key per signal and leveraging standard detection schemes in optical communication. ****Nonetheless, the security analysis of continuous variable quantum key distribution has fallen behind its discrete variable cousin. This proposal will allow us to improve dramatically the security analysis of continuous variable quantum key distribution protocols. We do so by exploiting and generalizing the many techniques that have been used in discrete variable quantum key distribution to the case of continuous variables. Our work will pave the way to the widespread application of continuous variable quantum key distribution. It will enhance the Canadian leadership position in security research in quantum key distribution.****