Pedro Mendes

Quantum communication ensures security by using quantum mechanics, typically through Quantum Key Distribution (QKD) which is limited to a few hundred kilometers for useful secret key rates. This study examines Quantum Keyless Private Communication (QKPC), inspired by the classical wiretap model, which allows secure one-way communication without shared keys. Two implementations are explored: the original On-Off Keying (OOK) and a new polarization-based version. Both methods are implemented experimentally and the results confirm their effectiveness and potential as practical alternatives to traditional QKD for secure, long-distance communication.