Feeds

WTF is... Li-Fi?

Optical data transfer's new leading light?

Business security measures using SSL

From Palm Pilots to high-speed data

Germany's Fraunhofer Institute, best known for developing the MP3 audio codec, runs a photonics lab in Dresden. Earlier this year, it said it had created a wireless optical link capable of delivering data at the rate of 3Gbps.

Fraunhofer's technology isn't true VLC - it uses infrared light. So it has the backing of the IrDA, the Infrared Data Association, the organisation founded in 1993 to oversee device-to-device infrared communications standards. You know, beaming business card details from one Palm Pilot to another, or early wireless printing kit, or even linking a computer to an old Nokia phone as a modem.

Fraunhofer boffin works on IR board

A Fraunhofer boffin tweaks the Institute's IR tech

Hardly anyone builds IrDA ports into devices these days - USB, Bluetooth and Wi-Fi are faster and don't require line of sight. But the IrDA is looking to VLC to give it a new lease of life.

At the end of 2011, it pledged to work to define a new standard for 5Gbps and 10Gbps infrared communications, an effort building on the 1Gbps the existing Giga-IR standard supports. The Fraunhofer kit supports Giga-IR.

At these higher speeds, IrDA believes its updated standard could replace the likes of HDMI and USB 3.0.

D-Light delight

Meanwhile, Haas, together with Ediburgh University colleague Gordon Povey, continues to work with visible light. They and their team at the college's D-Light - "Data Light" - project have created kit capable of 130Mbps data transfer rights. A lot slower than Fraunhofer's rig, to be sure, but one delivered by off-the-shelf parts rather than custom lab components. Povey and Haas believe they can push that speed to at least 1Gbps. Other Li-Fi proponents claim 10Gbps will be possible with specially designed LED lightsources.

Both boffins also run PureVLC, a company founded to commercialise Li-Fi technology on behalf of the University, and this month PureVLC claimed to have sent the first text message send by LED to an unmodified Android handset.

PureVLC's 'Smart Lighting Development Kit' board

Coming soon: PureVLC's 'Smart Lighting Development Kit' board

To be fair, the data rate was a low 2.5Kbps and it requires a special app to control the handset's cameras and detect the message. But PureVLC's demo showed that messages can be sent with low-cost kit and that doing so doesn't register with the human eye.

PureVLC is also promising to release a "Smart Lighting Development Kit", a full duplex VLC system that connects to standard LED light fixtures, in Q2 2012.

Secure remote control for conventional and virtual desktops

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Protecting users from Firesheep and other Sidejacking attacks with SSL
Discussing the vulnerabilities inherent in Wi-Fi networks, and how using TLS/SSL for your entire site will assure security.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.