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Category: internet – Page 161

Twin-field quantum key distribution (QKD) across an 830-km fibre

By using quantum key distribution (QKD), quantum cryptographers can share information via theoretic secure keys between remote peers through physics-based protocols. The laws of quantum physics dictate that photons carrying signals cannot be amplified or relayed through classical optical methods to maintain quantum security. The resulting transmission loss of the channel can limit its achievable distance to form a huge barrier to build large-scale quantum secure networks. In a new report now published in Nature Photonics, Shuang Wang and a research team in quantum information, cryptology and quantum physics in China developed an experimental QKD system to tolerate a channel loss beyond 140 dB across a secure distance of 833.8 km to set a new record for fiber-based quantum key distribution. Using the optimized four-phase twin-field protocol and high quality setup, they achieved secure key rates that were more than two orders of magnitude greater than previous records across similar distances. The results form a breakthrough to build reliable and terrestrial quantum networks across a scale of 1,000 km.

Quantum cryptography and twin-field quantum key distribution (QKD)

Quantum key distribution is based on fundamental laws of physics to distribute secret bits for information-theoretic secure communication, regardless of the unlimited computational power of a potential eavesdropper. The process has attracted widespread attention in the past three decades relative to the development of a global quantum internet, and matured to real-world deployment through optical-fiber networks. Despite this, wider applications of QKD are limited due to channel loss, limiting increase in the key rate and range of QKD. For example, photons are carriers of quantum keys in a QKD setup, and they can be prepared at the single-photon level to be scattered and absorbed by the transmission channel. The photons, however, cannot be amplified, and therefore the receiver can only detect them with very low probability. When transmitted via a direct fiber-based link from the transmitter to the receiver, the key rate can therefore decrease with transmission distance.

Google warns that defamation case ruling will force it to ‘censor’ the internet

The Guardian reports that the case revolves around George Defteros, a Victoria defense lawyer who previously represented Melbourne gangland figures. He sued Google over claims that its publication of search results showing a 2004 article defamed him.

The article from The Age implied that Defteros had become more than just a lawyer for criminal elements but was also a friend and confidant, crossing professional boundaries. The piece also reported on the murder charges Defteros faced in relation to the killing of three men. Prosecutors withdrew the charges in 2005.

Defteros’ lawyers contacted Google in February 2016 and asked it to remove the article, but Google refused as it said The Age was a reputable source. The piece was eventually removed in December 2016 after it had been accessed a further 150 times.

Facebook robot winds fiber-optic cable around power lines

A Facebook robot that wraps fiber-optic cable around existing power lines could help bridge the digital divide by bringing internet access to some of the billions of people who currently lack it.

Why it matters: The 60% of the world population with internet access has social, economic, financial, and educational advantages over the other 40%, most of whom live in developing nations or rural areas.

The cost of expanding internet networks is a major barrier to bringing internet access to those people — if the Facebook robot can cut that cost, it could help close this “digital divide” and make the world a more equitable place.

Why User Education Is Necessary To Avoid AI Failure

The more a technology or concept permeates and gets normalized in our day-to-day lives, the more we grow to expect from it. About two decades ago, a sub-56kpbs dial-up internet connection seemed miraculous. Today, with internet speeds as high as 2000Mbps becoming normal, the 56Kbps connection would be considered a failure of sorts—in the developed world, at least. This shift in expectation also applies to AI. Having seen numerous practical AI applications aid human convenience and progress, both the general population and the AI research community now expects every new breakthrough in the field to be more earth-shattering than the previous one. Similarly, what qualifies as AI failure has also seen a massive shift in recent years, especially from a problem owner’s perspective. failure, in most cases, is attributed to technology-centric factors like the quality of data or the capabilities of algorithms and hardware used, ignoring the most crucial aspect of AI success—the end user.

How emerging tech will influence freedom, industry, and money in the metaverse

It is clear to see that the variety of businesses, individuals, and entities that could potentially operate in the metaverse is vast. The widespread use and acceptance of decentralization through the growth of crypto, NFTs, and DeFi point to a fully-realized future operating outside of the parameters of today’s established markets.

Evidently, therefore, the metaverse is not a sci-fi fantasy conjured up in a dystopian novel, but a more tangible and natural progression for the current structuring of the internet. The founding principles of the metaverse have already been introduced in many ways. Now its development centers on blockchain technology and DeFi to propel it from the conceptual stage towards the implementation phase. This development will allow us to firmly realize the true extent that the metaverse will impact our lives.

The gaming industry is one such sector that stands to benefit greatly from developments arising in the metaverse. Gaming skins, which are in-game avatar outfits, are expected to trade at a level of $40 billion every year. Eighty-one percent of players aware of these skins want to trade them for real-world money, according to a report from DMarket. Currently, there is no method of transferring skins across gaming universes or trading them for currency. In the metaverse, however, as every separate gaming universe is connected through a decentralized economy, this would be possible. The use of metaverse-based banks would also enable transactions like these.

SpaceX Starlink: Why humanity needs to act now before it’s too late

We will soon need to make some difficult choices.

Given current trends, that number will be reached within a year or so. There are ways to mitigate the effect of these streaks. Painting the satellites and adding reflective panels could reduce their brightness, particularly at infrared wavelengths that are important for near-Earth asteroid detection.

But the study points out that the mitigation strategy currently proposed by Starlink won’t be sufficient to avoid an impact on astronomy.

It is clear we will soon need to make some difficult choices about satellite Internet. While it could broaden human connection to even the poorest and most remote regions of the world, it could also destroy our ability to view the heavens and more deeply understand the universe we call home.

WI-FI 7: The First Time WI-FI Will Be a ‘True Ethernet Replacement’

Say goodbye to that buffering wheel.

The next generation of Wi-Fi is just around the corner.

Taiwan-based semiconductor firm MediaTek successfully conducted the first-ever live demo for Wi-Fi 7 technology, according to a report from DigitalTrends. The company also stated that it expects Wi-Fi 7 products to become available next year in anticipation of the launch of the next-gen Wi-Fi sometime around 2024.

In a press statement, the company said it showed off the “super-fast speeds and low latency transmission” of its Wi-Fi 7 Filogic technology to “key customers and industry collaborators.” Wi-Fi 7, as shown in MediaTek’s demo, will deliver 2.4 times more speed than Wi-Fi 6, even using the same number of antennas.

This, according to the Wi-Fi Alliance, means that Wi-Fi 7 could provide speeds of more than 30 gigabits per second (Gbps) and close to 40Gbps. As ArsTechnica points out, the still relatively new Wi-Fi 6 reaches speeds of up to 9.6Gbps.

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Advanced UHD video moves toward living rooms of households

A string of Chinese video platforms are accelerating moves toward producing high-quality, 8K ultrahigh definition content by integrating 5G, artificial intelligence and virtual reality technologies.

It’s an important step toward moving 8K video into people’s living rooms, experts said.

Chinese UHD video production and distribution platform Sikai Garden Network Technology Co Ltd, also known as 4K Garden, plans to send UHD content to different terminal devices, including televisions, outdoor 8K light-emitting diode screens and VR headsets, and to explore diversified and innovative applications for the UHD industry, said Wu Yi, chairman of 4K Garden.

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