Indoor LiFi
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- Опубликовано: 5 окт 2024
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Light may not penetrate walls, but it does penetrate glass windows. Most walls have one or more of those, so let's not oversell the security advantages. Cool technology regardless.
Ye, and ordinary curtains do not block light, some video sensors can easily see light through fabric curtains or any other thin material as if its not there. So hackers would be able to steal data through windows from very afar, kilometers away even. If hackers would have point laser emitters, they may even interact with Li-Fi network in chosen apartment and hack into the system and control it.
@Hokunin The same concern applies with wifi, but we don't have this problem because encryption exists. Lifi would probably just do the same thing
@SMorrisRose I imagine it wouldn't be too hard to have windows with special glass or coating that attenuates the lifi wavelength (e.g. infra-red at 700nm). This all also ignores the fact that the attenuation over distance is probably far higher than radio signals.
@@fbcpck ye, the thing is, it would be awfully suspicious for some dude to walk around with laptop and other hardware from floor to floor sitting on the stairs and then walking with all that to another apartment building, looking for weakly defended wifi networks, cuz each wifi network doesn't extend too far, signal becomes weak even at the next room of one living apartment. Strangers also won't be allowed to enter any appartment building. So mostly they don't bother with wifi. Whereas with Li-Wi, hackers can have any sized equipment at hand, no need to move around, and they will have thousands of windows available for probing, just keep clicking mouse button. It will become physically easier, less bothersome, so many would be hackers would start trying to hack.
Hi, thanks for your input! It is true that light penetrates windows but optical communication cells can be sharply confined. Cell sizes of only a few square meter are possible, giving you the control were your data goes. This is simply not possible with RF. Thereby LiFi can add another layer of security to wireless communication, next to all other commonly used encryption methods. Moreover it is robust against jamming, which is an important security feature in industrial or medical environments.
This seems like regression instead of progression. Sorta like the telephone. We actually used to talk to each other directly, which was an astounding invention, then wireless came along, which untethered us from the wall. When cellphones became common, people still talked, but texted a little. Then smartphones came out with emojis. Now most everybody texts and uses emojis. So we went from talking, back to writing and then back to hieroglyphics. They're coming out with this, because they want everyone to switch to just virtual reality, and if this thing works like it's supposed to, people won't have any interruptions. They want Ready Player One in real life for us!
That’s a profound theory. Thank you for sharing.
It’s not a regression if it’s a new way to use light waves for data communications. We currently use RF for cell phones and AM/FM, TV, Wi-Fi. So why not use light, if at all possible?
So... You guys had reinvented IrDA? 😂😂😂
Well, not exactly. Whoever had the chance to experience IrDA and LiFi in real life will immediately see the significant differences. LiFi offers full mobility, data rates up to multiple gigabit per seconds and is using state of the art technology. With a single LiFi access point you can cover several square meter of a room at several meters distance.
I can see the ads now "Visibly better wifi"
Clean and no radiation, I hope they move forward with this, nature thanks you
Next thing you know someone is going to hack your house😂😂😂
So what happens at nite when you want to use Li-Fi in the dark ?
Lifi uses infrared light, so human eyes do not see it. I.e. it works in the dark.
It transmits on infrared wavelengths that are invisible to the human eye.
@@littlbilly76 LiFi standard compliant device operates from 380 nm to 780 nm wavelength region. This devices operate on one or multiple visible light frequency bands.
Hi, thanks for your question! LiFi can also use wavelength in the near infrared region. A lot of optical components are available at 850 nm or 940 nm, which is not visible for the human eye. Therefore the LiFi systems can also be operated in the dark, without distracting the user of the system.
@@FraunhoferHHI thanks for clarifying
And when Intel, AMD, Qualcomm, Mediatek, Samsung, Apple plan to support this technology?
This is an old concept. Amazon Go stores already tried this. Walmart has been considering. The retrofit does not justify the current need for internet speed.
Hi, thanks for your thoughts. The concept may be known but the technology is brand new. The high requirements for mobile communication, especially the next generation 6G, make disruptive technologies that add new spectrum to the already overcrowded RF band necessary. HD television was also invented earlier but the great success came much later.
Where do i order??😊
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