Researchers at the University of Toronto, including CQIQC members Li Qian and Hoi-Kwong Lo, have uncovered hidden multi-dimensional modulation side channels in quantum protocols — a significant threat to quantum security. The study, led by Amita Gnanapandithan, a PhD Engineering student co-supervised by Professors Lo and Qian, highlights previously overlooked flaws that could create security loopholes. These findings, published in Physical Review Letters, mark a critical step in strengthening the the security of quantum cryptographic protocols.

We invite you to read the article, "Hidden side channels in quantum sources could compromise secure communication" authored by Tyler Irving to learn more about this research.