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。不幸的是，传统的加密方案往往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。与传统密码学不同，量子密钥分发基于物理定律提供了无条件的安全性。连续可变量子密钥分配具有每个信号产生多于1位密钥和利用光通信中标准检测方案的潜在优势。****尽管如此，连续变量量子密钥分配的安全性分析已经落后于离散变量。该方案将极大地提高连续可变量子密钥分发协议的安全性分析。我们利用和推广了离散变量量子密钥分布中使用的许多技术来实现连续变量的情况。我们的工作将为连续可变量子密钥分发的广泛应用铺平道路。它将加强加拿大在量子密钥分发安全研究方面的领导地位。****

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.****