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Light Fidelity or LiFi is a new scientific breakthrough which promises to make our phones and laptops a lot faster. It is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds.

Li-Fi is a transformative technology changing the way we connect to the internet by using the same light we use to illuminate our offices, home and even streets. LiFi uses visible light from LED bulbs to transfer data, rather than WiFi’s radio waves and could be 100 times faster than Wi-Fi. It utilizes LED lights that illuminate both our workspace and homes to transmit high speed, bidirectional, secure and fully networked wireless internet.

Chinese scientists have come closer to develop this faster wireless communication channel that would be accessible in the next six years. They have already made progress increating full-colour emissive carbon nanomaterial dots (F-CDs) to provide the light to transmit data. The latest research going on related to Li-Fi uses rare earth materials to provide light, but Chinese experts have come up with another option, F-CDs, a fluorescent carbon nano material to provide light. This method is safer, reliable and faster. “Many researchers around the world are still working on this. We were the first to successfully create it using cost-effective raw materials such as urea with simple processing,” Qu Songnan, an associate researcher at Changchun Institute of Optics said. Qu informed that as the rare earth has a longer lifespan it diminish the speed of Li-Fi transmission. F-CDs, on the other hand, provides faster transmission of data. New nano material introduced by Qu’s group of scientists can emit all light visible to the human eye. This is an innovative development in fluorescent carbon nano material field.
Qu further added that this breakthrough this essential in the development of Li-Fi which he anticipates will enter the market in the next six years.Chinese tests in 2015 showed that Li-Fi can reach speeds of 50 gigabytes per second. The technology began to make waves after scientist Harald Haas of the University of Edinburgh discussed it in a 2011 TED talk. It has been viewed 2.2 million times.
Technologies based on Li-Fi are currently being developed by several companies in Russia, Mexico and around the world. Li-Fi offers lighting innovators the opportunity to enter new markets and drive completely new sources of revenue by providing wireless communications systems.

Li-Fi is a game changer not only for the communications industry but also for the lighting industry, and with LiFi, Linmore LED certainly has a brighter future.
There’s no doubt that LiFi is going to transform the world of Internet connectivity, but it seems unlikely that its rise would necessarily mean the death of Wi-Fi since the latter is deeply embedded in the lifestyles of billions of people.
A more likely scenario would be that we’ll eventually have a wide range of technologies available at our disposal and will be free to choose the most appropriate one.

How to tell who has recently signed in to your account
ID: SLN2073
Refers to: Yahoo! Account, Mail, Mail Classic

Description
Explanation and how to use the Recent Login Activity feature of Yahoo! Account. Recent Login Activity shows several days of account sign-in activity. Use Recent Login Activity if you are suspicious that an unauthorized person may have broken into your account.

Resolution
Yahoo! created the "Recent Login Activity" page to help our customers see key information about each sign in to their Yahoo! account. The page shows several days of sign-in activities including the dates, how it was accessed, and the locations. With this page you can see if your account has been accessed by an unauthorized person.
To access the Recent Login Activity page:
1. Go to the Yahoo! Account Information page.
- Sign in to your account if prompted.
2. Under "Sign-In and Security," select View your recent sign-in activity.
- The "Yahoo! Account Info" page opens to the "Recent Login Activity" information.
- It displays a login activity table with several categories of sign-in activity information on your account covering several days.
3. To expand the list, select View More.
Brief description of login activity table information:
• Date/Time: The date and time the account was accessed.
• Access Type: The method of access such as a browser, mobile device, or a Yahoo! product like Yahoo! Messenger.
- To learn more, see our help article about Access Types and Events.
• Event: Which Yahoo! services were used (Mail, FrontPage, etc.).
• Location/IP Address: Select either Location (default selection) or IP Address from this menu.
- Location: The Country and State/Province location of the computer used to sign in.
- IP Address: The IP (Internet Protocol) Address location of the computer used to sign in.


A. Did you access your Mail on Sept 10, 2012?
B. Shows access from browser, not mobile phone
C. Did you recently log in from Nebraska?
How to detect signs of suspicious activity:
• Look for activity that doesn't match how you normally use Yahoo!.
-Seeing multiple geographic locations: When you normally only access Yahoo! from just one or two computers.
-The Access type shows a mobile device: When you never use a mobile device to access your account.
What you should do if you see suspicious activity:
• Change your password: Go to the Change your Yahoo! password page and change your password.
- It's one of the most important things you can do to make your account more secure.
- Learn more about creating a better password, see our help article about creating a secure, strong password.
• Create a Yahoo! sign-in seal: Go to the Yahoo! sign-in seal page.
- Learn how, see our help page about how to create a Yahoo! sign-in seal.
• Learn more about protecting your account, see our help article about safeguarding your Yahoo! account.
• Learn more about common account risks, see our help article about how an account can be compromised.

Last updated: November 08, 2012

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