Study of hardware vulnerability in continuous variable quantum communication

随着互联网的兴起，加密的重要性与日俱增。遗憾的是，传统的加密方案往往基于未经证实的计算假设，而大规模量子计算机的构建可能会违反这一假设。与传统的密码学不同，量子密钥分发基于物理定律提供无条件的安全性。连续可变量子密钥分发具有在每个信号中产生多于一位密钥以及在光通信中利用标准检测方案的潜在优势。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它的离散变量表亲。该方案将极大地提高连续变量量子密钥分配协议的安全性。我们通过将离散变量量子密钥分配中使用的许多技术推广到连续变量的情况来实现这一点。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。这将增强加拿大在量子密钥分发安全研究方面的领先地位。

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.