> Notably, Li-fi ensures robust security by exclusively transmitting data to areas illuminated by light.
Can someone explain how this ensures security?
Because hackers always work in the dark? /s
Can someone explain how this ensures security?
Because hackers always work in the dark? /s
It just means that visible or IR light (What are they using?) won't leak through walls the way Wi-Fi does. Depending on how wide the beam is and exactly how it all works, it _might_ still leak out of windows and under doors. But it's not like someone casually wardriving outside your house will get as much as they would from Wi-Fi, I would think.
The sun has a radius of about 700,000 km. Only a few hundred km is transparent enough for light to pass through and has a density of about 300 mg per cubic meter. Roughly the density of air at the altitude where airliners cruise.
The photons you see originate from a layer that’s just 0.5% of the radius of the sun. That layer is heated with other photons from inside. The core temp is 15 million K while the photosphere is around 5800 K. The spectrum of the core were the rest of the sun transparent would be much different and … unsafe. (Not that this really makes sense, if the rest of the star was transparent it would go nova)
Wi-Fi passes through walls, can be used to remotely infer keystrokes, human biometrics, position and activity.
> dark
Li-Fi can use infrared light, does not pass through walls.