Impact of Pilot-aided Signal Schemes on Practical CV-QKD Security
Utku Akin, Jonas Berl, SK Wasim Ahamed, Christian G. Schaeffer, Vitaly Rymanov, Andreas Stöhr, Tobias Fehenberger, Norbert Hanik · 2025
We experimentally explore security vulnerabilities in CV-QKD systems due to receiver nonlinearities. We demonstrate that higher pilot powers can lead to underestimating excess noise, showing the critical need to align the signaling scheme with receiver characteristics.