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A Nice Little Cryptography Primer

By itss | 28/06/2021
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Pun Intended.

Category: Technology
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  • Physicists Entangle Quantum Memories Across a Record-Breaking 420 Kilometers
    by BeauHD on 19/08/2026 at 7:00 am

    alternative_right shares a report from Phys.org: Optical fibers are already the backbone of global communication systems. Recently, however, physicists have started to explore how their functionality could be boosted further by conveying information via entangled quantum particles -- potentially enabling instantaneous exchanges of information across vast distances. Such a system could eventually be the basis of a future 'quantum internet,' offering a level of security and computing power beyond anything possible today. In new research published in Physical Review Letters, a team led by Xi-Yu Luo at the University of Science and Technology of China in Hefei has pushed that vision further than ever, entangling two quantum memories across 420 kilometers (261 miles) of optical fiber -- more than four times the previous record. Read more of this story at Slashdot.

  • Top Album Releases Linked To Rise In Fatal Crashes
    by BeauHD on 19/08/2026 at 3:30 am

    An anonymous reader quotes a report from The Guardian: The release of a new album by Taylor Swift might be a cause for celebration among her fans, but such events have also been linked to a more sombre phenomenon: an increase in fatal car crashes. The team behind a new study say it sheds light on the impact of distracted driving. Writing in the journal Jama Network Open, [Vishal Patel, first author of the study based at Harvard Medical School] and colleagues report how they focused on the release of 10 major albums, launched between 2017 and 2022, selected for having the highest number of Spotify streams over a single day. [...] The team found streaming volume for the top 200 songs in the US was 43% higher on the date of major album releases compared with the days surrounding the releases -- although such data does not reveal whether the music was being streamed in a car. [...] The researchers used data from a population-based registry of fatal US motor vehicle crashes to look at the number of traffic fatalities on the dates these albums were released, as well as for the 10 days either side. After taking into account the day of the week upon which the album was released, as well as federal holidays, and time of year, the researchers found the number of US traffic fatalities showed a relative increase of 15.1% on the date of major album releases, compared with similar days either side. "This is equivalent to approximately 182 fatalities in the US attributable to the release days of the 10 included albums," the team writes. Patel said the release of a new album could distract drivers because accessing music is a search task, not a single button press. "You unlock the phone, open the app, find the release, read down a tracklist, tap the right song. That's several seconds of looking at a screen," he said, adding unfamiliar music also demands more attention, while research has suggested listening to new, high-energy music measurably degrades driving performance. The researchers add the rise in traffic fatalities was greater among certain groups -- such as younger drivers, male drivers, people who were driving alone, and people driving cars with a built-in infotainment platform. The authors say the results suggest that "online music streaming through smartphones may significantly contribute to distracted driving and traffic fatalities." Read more of this story at Slashdot.

  • Cursor Launches 'Origin' Code Hosting Platform As GitHub Alternative
    by BeauHD on 18/08/2026 at 11:00 pm

    Cursor has launched Origin, a GitHub-style code hosting platform built directly into its AI coding environment. The company is initially positioning Origin as a low-risk layer on top of GitHub, keeping GitHub as the "source of truth," but the launch landed just as a major GitHub outage highlighted growing concerns about reliability in the age of AI-generated code. VentureBeat reports: Cursor began rolling out Origin, its own code hosting platform, to paid users on Monday morning. Roughly three and a half hours later, GitHub's status page lit up with what became a six-hour-and-forty-two-minute global degradation -- error rates near 20% across pull requests, issues and the API, and near 50% on archive and raw file downloads, according to GitHub's incident log. Enterprise single sign-on went down with it: SAML, OIDC, SCIM provisioning and Team Sync all failed. So did Copilot. The developer internet did what the developer internet does. "You can now host your repos in Cursor Origin and deploy to Vercel via Cursor Origin which is itself hosted on Vercel," Vercel chief executive Guillermo Rauch posted on X. "And unlike GitHub, it's online [smile emoji]" Asked why he was smiling, Rauch replied: "trying to make light of the situation. We ourselves are stuck because of github rn!" Matt Palmer, who works at Cursor, quote-tweeted his own company's launch with the day's best line: "We were going to ship this earlier, but GitHub was down." A GitHub outage, in other words, delayed the launch of a GitHub competitor. Product launches get locked weeks in advance, and no evidence suggests Cursor timed this one. But the coincidence did the company an enormous favor, because it dramatized the argument Origin exists to make. For eighteen years, choosing where to host your team's source code has been the least interesting decision an engineering organization makes. Cursor is betting that AI agents have made it interesting again -- and for technical decision makers, that is the real news here. Not a new product, but a new procurement question with a governance problem attached. Read more of this story at Slashdot.

  • Comcast Is Turning Millions of Its Routers Into Motion Detectors
    by BeauHD on 18/08/2026 at 10:00 pm

    Comcast is activating Wi-Fi motion sensing on millions of compatible Xfinity gateways, allowing the routers to detect movement by measuring disruptions in signals between the gateway and connected devices. The free feature, part of Xfinity Shield, can send activity alerts through the Xfinity app and offers Home, Away, and nighttime monitoring modes without requiring separate motion sensors. The Verge reports: Wi-Fi motion sensing is a technology that has been around for a while, but it's only recently that it's become accurate and reliable enough to catch on. Linksys launched a similar service in 2021, but discontinued it a few years later. Lighting company Wiz launched a line of Wi-Fi-sensing smart bulbs in 2023, and more recently Philips Hue deployed a similar radio-frequency sensing technology in its products (using Zigbee rather than Wi-Fi). Comcast's motion sensing pairs with new modes in the Xfinity app -- Home Watch, Away Watch, and Dark Watch (a night/sleep mode) -- allowing you to turn sensing on or off based on your activities. Read more of this story at Slashdot.

  • Disney, ABC Sue FCC Over Threats to Broadcast Licenses
    by BeauHD on 18/08/2026 at 9:00 pm

    Disney and ABC are suing the FCC to block an early review of eight station licenses, arguing the Trump administration is using the agency's regulatory power to punish the network over programming and editorial decisions it dislikes. Reuters reports: In a lawsuit (PDF) filed in U.S. District Court in Washington, Disney said the FCC was seeking to coerce and retaliate against "a network that refuses to bow to the administration's demands," calling the agency's actions an "extraordinary assault on free speech." Trump has waged an aggressive series of attacks on the news media and the latest move follows a two-year-long battle between Trump and Disney. Last month, Trump again called for ABC stations to lose their licenses because the network refused to air a prime-time speech on elections. The court case will pose a key test of the free speech rights of media outlets. Disney and ABC asked the court (PDF) to quickly issue a temporary restraining order halting the license renewal proceedings and preventing the FCC from scheduling a hearing. The company said the public comment period ended earlier this month and the FCC could act at any time. The lawsuit alleges that the administration is violating the company's First Amendment free speech rights, saying that the FCC "is using its regulatory power to retaliate against (Disney and ABC) for programming and editorial decisions the administration dislikes." The FCC said the move stemmed from a year-long investigation into whether Disney's diversity policies amounted to unlawful discrimination, an allegation the company denies. U.S. District Judge Loren AliKhan issued an order on Tuesday directing the company and the FCC to propose a schedule for considering the request for a temporary restraining order and told the agency to notify her if it moves to start the process of revoking the ABC licenses. Read more of this story at Slashdot.

  • Memory Prices Climb 500% In 12 Months
    by BeauHD on 18/08/2026 at 8:03 pm

    RAM prices have exploded over the past year, with some DDR5 kits approaching 500% year-over-year increases and a 128GB kit now selling for $3,399, which is more than 10 times its previous low. Tom's Hardware reports: Things improve as you step down the memory capacities and speed tiers, but not as much as we'd like. You're still looking at $392 for a memory kit that was just $72 last year. To reinforce the point, I pulled the latest average price data from PCPartPicker, comparing where we are today (August 2026) to exactly one year ago. This data is somewhat approximate, but it should be broadly accurate. [...] A standard 64GB (2x32GB) DDR5-5600 kit that would have cost you under $200 last summer is now demanding over $1,100. It is a 5x multiplier on a component that used to be a fairly boring and predictable line item in a PC build budget. If you plan to just wait it out on an older AM4 or LGA1700 motherboard with DDR4, you'd better hope your memory holds out too, because DDR4 isn't safe from the fallout. With DDR5 entirely out of reach for most builders, the resulting scramble for older platforms running DDR4 memory has created a massive knock-on effect, and as a result, DDR4 kits are up anywhere from 120% to nearly 180% across the board. Nowhere near as bad as DDR5 pricing, but it still stings when a kit that was $105 last year is $281 this year. This phenomenon is by no means exclusive to the US, either. German tech site ComputerBase have also been tracking this global trend, reporting just this week that average RAM prices in Europe have skyrocketed by 345% compared to September 2025. Their data shows the squeeze is bleeding into other components too, with hard drive and SSD prices both climbing over 125% in that same timeframe. In fact, the situation is so severe that hyperscale buyers have reportedly already locked in almost all of the global DRAM production capacity for 2027, handing over advance deposits to guarantee their supply of precious DRAM, which is now among the highest-value commodities in the world by weight; mainstream DRAM chips are worth over half as much per kilogram as solid gold. Read more of this story at Slashdot.

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