DV-QKD System is available for testing. The prototype of the single photon source at 1550nm is ready in TRL5 in bulk and integrated form. It is a faint-pulse source that emits time-phase states in the decoy BB84 protocol. The clocks of the source and receiver are standard crystal oscillators with large clock frequency fluctuations in contrast to atomic references. They are synchronized by processing the arrival time information of a single photon according to the publication [1], resulting in only picosecond time deviations. The SPADs and SNSPDs with high efficiency are available for testing. * We can also offer the optimized design support for your hardware and prototyping and miniaturization/integration of your source. * Upgrade to HD-QKD is also available. [1] Christopher Spiess and Fabian Steinlechner, "Clock synchronization with pulsed single photon sources", Quantum Sci. Technol. 9, 015019 (2024). https://iopscience.iop.org/article/10.1088/2058-9565/ad0ce0/meta