Historic: India gets 1000 km secure quantum net!

[Ishita]

I came across this infographic and wanted to share it here for your thoughts. It points out a major breakthrough for India's technology and defence sectors.

Key claims shown in the image:

* Massive scale: India has successfully set up a 1000 km secure quantum communication network, putting it among the longest in the world.
* Rapid implementation: The milestone was reached in under two years from the launch.
* Strategic impact: It should boost secure communications for defence, finance and critical infrastructure.
* Versatility: The network is said to support underwater and underground channels.

The graphic credits the current Modi government for driving the initiative and giving India a "quantum leap".

This looks like a huge step forward for national security and cyber‑defence. I'd love to hear from anyone with a background in quantum physics, networking or cyber security.

* How hard is it to keep quantum entanglement and data integrity over 1000 km?
* What are the long‑term implications?
* Will everyday civilians see benefits soon?

Let's discuss!

Source : https://www.pib.gov.in/PressReleasePage.aspx?PRID=2250162&reg=3&lang=1

[Hari]

I wish the scientists behind it were shown in the graphic.

[Amitabh]

1. Maintaining quantum entanglement over long distances isn't that hard. Researchers have sent entangled particles thousands of kilometres, even to satellites and back, using standard fibre‑optic cables.

2. The interesting part is the links, transmitters and receivers – all made locally. The signal weakens, so repeaters are needed.

From a research perspective it's fascinating, but I doubt we'll see large‑scale practical use in the next 50‑100 years.

Our current encryption standards aren't safe against a powerful quantum computer (we haven't built one yet). When such a machine becomes feasible, we can switch to quantum‑safe algorithms.

We already have quantum‑safe encryption that can run on mobiles and laptops; we just don't use it because of legacy and practicality.

Some organisations are storing encrypted data now, hoping to crack it later when quantum computers arrive. This technology won't help them – any attempt would cause wave‑function collapse.

So, practically, I don't see a real‑world use for this tech in the next 50‑100 years. I'll be glad if I'm wrong.