First Indian free‑space quantum key distribution link tested over 5.56 km.
Used a pointing, acquisition and tracking system to aim the light beam.
Achieved quantum bit error rate under five percent.
Generated secure keys at 230–260 bits per second.
Integrated with a post‑quantum cryptography platform called Vedic Kavach.
Shows a path toward satellite‑based quantum‑secure networks.
The trial covered a distance of about five and a half kilometres between a space institute and a university.
A special pointing and tracking tool kept the light beam steady during the night.
The system kept errors below five percent and produced around 250 secret bits each second.
Combining a hardware light device with a software safety program gave two layers of protection.
Want to learn even more? Click here to read the full story!