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A Nice Little Cryptography Primer

By itss | 28/06/2021
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Category: Technology
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  • The World's Electric Car Sales Have Spiked 21% So Far in 2025
    by EditorDavid on 13/12/2025 at 6:34 pm

    Electrek reports: EV and battery supply chain research specialists Benchmark Mineral Intelligence reports that 2.0 million electric vehicles were sold globally in November 2025, bringing global EV sales to 18.5 million units year-to-date. That's a 21% increase compared to the same period in 2024. Europe was the clear growth leader in November, while North America continued to lag following the expiration of US EV tax credits. China, meanwhile, remains the world's largest EV market by a wide margin. Europe's EV market jumped 36% year-over-year in November 2025, with BEV sales up 35% and plug-in hybrid (PHEV) sales rising 39%. That brings Europe's total EV sales to 3.8 million units for the year so far, up 33% compared to January-November 2024... In North America, EV sales in the US did tick up month-over-month in November, following a sharp October drop after federal tax credits expired on September 30, 2025. Brands including Kia (up 30%), Hyundai (up 20%), Honda (up 11%), and Subaru (232 Solterra sales versus just 13 the month before) all saw gains, but overall volumes remain below levels when the federal tax credit was still available... [North America shows a -1% drop in EV sales from January to November 2025 vs. January to November 2024] Year-to-date, EV sales in China are up 19%, with 11.6 million units sold. One of the biggest headlines out of China is exports. BYD reported a record 131,935 EV exports in November, blowing past its previous high of around 90,000 units set in June. BYD sales in Europe have jumped more than fourfold this year to around 200,000 vehicles, doubled in Southeast Asia, and climbed by more than 50% in South America... "Overall, EV demand remains resilient, supported by expanding model ranges and sustained policy incentives worldwide," said Rho Motion data manager Charles Lester. Beyond China, Europe, and North America, the rest of the world saw a 48% spike in EV sales in 2025 vs the same 11 months in 2024, representing 1.5 million EVs sold. "The takeaway: EV demand continues to grow worldwide," the article adds, "but policy support — or the lack thereof — is increasingly shaping where this growth shows up." Read more of this story at Slashdot.

  • How a 23-Year-Old in 1975 Built the World's First Handheld Digital Camera
    by EditorDavid on 13/12/2025 at 5:34 pm

    In 1975, 23-year-old electrical engineer Steve Sasson joined Kodak. And in a new interview with the BBC, he remembers that he'd found the whole photographic process "really annoying.... I wanted to build a camera with no moving parts. Now that was just to annoy the mechanical engineers..." "You take your picture, you have to wait a long time, you have to fiddle with these chemicals. Well, you know, I was raised on Star Trek, and all the good ideas come from Star Trek. So I said what if we could just do it all electronically...?" Researchers at Bell Labs in the US had, in 1969, created a type of integrated circuit called a charge-coupled device (CCD). An electric charge could be stored on a metal-oxide semiconductor (MOS), and could be passed from one MOS to another. Its creators believed one of its applications might one day be used as part of an imaging device — though they hadn't worked out how that might happen. The CCD, nevertheless, was quickly developed. By 1974, the US microchip company Fairchild Semiconductors had built the first commercial CCD, measuring just 100 x 100 pixels — the tiny electronic samples taken of an original image. The new device's ability to capture an image was only theoretical — no-one had, as yet, tried to take an image and display it. (NASA, it turned out, was also looking at this technology, but not for consumer cameras....) The CCD circuit responded to light but could only form an image if Sasson was somehow able to attach a lens to it. He could then convert the light into digital information — a blizzard of 1s and 0s — but there was just one problem: money. "I had no money to build this thing. Nobody told me to build it, and I certainly couldn't demand any money for it," he says. "I basically stole all the parts, I was in Kodak and the apparatus division, which had a lot of parts. I stole the optical assembly from an XL movie camera downstairs in a used parts bin. I was just walking by, you see it, and you take it, you know." He was also able to source an analogue to digital converter from a $12 (about £5 in 1974) digital voltmeter, rather than spending hundreds on the part. I could manage to get all these parts without anybody really noticing," he says.... The bulky device needed a way to store the information the CCD was capturing, so Sasson used an audio cassette deck. But he also needed a way to view the image once it was saved on the magnetic tape. "We had to build a playback unit," Sasson says. "And, again, nobody asked me to do that either. So all I got to do is the reverse of what I did with the camera, and then I have to turn that digital pattern into an NTSC television signal." NTSC (National Television System Committee) was the conversion standard used by American TV sets. Sasson had to turn only 100 lines of digital code captured by the camera into the 400 lines that would form a television signal. The solution was a Motorola microprocessor, and by December 1975, the camera and its playback unit was complete, the article points out. With his colleague Jim Schueckler, Sasson had spent more than a year putting together the "increasingly bulky" device, that "looked like an oversized toaster." The camera had a shutter that would take an image at about 1/20th of a second, and — if everything worked as it should — the cassette tape would start to move as the camera transferred the stored information from its CCD [which took 23 seconds]. "It took about 23 seconds to play it back, and then about eight seconds to reconfigure it to make it look like a television signal, and send it to the TV set that I stole from another lab...." In 1978, Kodak was granted the first patent for a digital camera. It was Sasson's first invention. The patent is thought to have earned Eastman Kodak billions in licensing and infringement payments by the time they sold the rights to it, fearing bankruptcy, in 2012... As for Sasson, he never worked on anything other than the digital technology he had helped to create until he retired from Eastman Kodak in 2009. Thanks to long-time Slashdot reader sinij for sharing the article. Read more of this story at Slashdot.

  • More of America's Coal-Fired Power Plants Cease Operations
    by EditorDavid on 13/12/2025 at 4:34 pm

    New England's last coal-fired power plant "has ceased operations three years ahead of its planned retirement date," reports the New Hampshire Bulletin. "The closure of the New Hampshire facility paves the way for its owner to press ahead with an initiative to transform the site into a clean energy complex including solar panels and battery storage systems." "The end of coal is real, and it is here," said Catherine Corkery, chapter director for Sierra Club New Hampshire. "We're really excited about the next chapter...." The closure in New Hampshire — so far undisputed by the federal government — demonstrates that prolonging operations at some facilities just doesn't make economic sense for their owners. "Coal has been incredibly challenged in the New England market for over adecade," said Dan Dolan, president of the New England Power Generators Association. Merrimack Station, a 438-megawatt power plant, came online in the1960s and provided baseload power to the New England region for decades. Gradually, though, natural gas — which is cheaper and more efficient — took over the regional market... Additionally, solar power production accelerated from 2010 on, lowering demand on the grid during the day and creating more evening peaks. Coal plants take longer to ramp up production than other sources, and are therefore less economical for these shorter bursts of demand, Dolan said. In recent years, Merrimack operated only a few weeks annually. In 2024, the plant generated just0.22% of the region's electricity. It wasn't making enough money to justify continued operations, observers said. The closure "is emblematic of the transition that has been occurring in the generation fleet in New England for many years," Dolan said. "The combination of all those factors has meant that coal facilities are no longer economic in this market." Meanwhile Los Angeles — America's second-largest city — confirmed that the last coal-fired power plant supplying its electricity stopped operations just before Thanksgiving, reports the Utah News Dispatch: Advocates from the Sierra Club highlighted in a news release that shutting down the units had no impact on customers, and questioned who should "shoulder the cost of keeping an obsolete coal facility on standby...." Before ceasing operations, the coal units had been working at low capacities for several years because the agency's users hadn't been calling on the power [said John Ward, spokesperson for Intermountain Power Agency]. The coal-powered units "had a combined capacity of around 1,800 megawatts when fully operational," notes Electrek, "and as recently as 2024, they still supplied around 11% of LA's electricity. The plant sits in Utah's Great Basin region and powered Southern California for decades." Now, for the first time, none of California's power comes from coal. There's a political hiccup with IPP, though: the Republican-controlled Utah Legislature blocked the Intermountain Power Agency from fully retiring the coal units this year, ordering that they can't be disconnected or decommissioned. But despite that mandate, no buyers have stepped forward to keep the outdated coal units online. The Los Angeles Department of Water and Power (LADWP) is transitioning to newly built, hydrogen-capable generating units at the same IPP location, part of a modernization effort called IPP Renewed. These new units currently run on natural gas, but they're designed to burn a blend of natural gas and up to 30% green hydrogen, and eventually100% green hydrogen. LADWP plans to start adding green hydrogen to the fuel mix in 2026. "With the plant now idled but legally required to remain connected, serious questions remain about who will shoulder the cost of keeping an obsolete coal facility on standby," says the Sierra Club. One of the natural gas units started commerical operations last Octoboer, with the second starting later this month, IPP spokesperson John Ward told Agency]. the Utah News Dispatch. Read more of this story at Slashdot.

  • Rust in Linux's Kernel 'is No Longer Experimental'
    by EditorDavid on 13/12/2025 at 3:34 pm

    Steven J. Vaughan-Nichols files this report from Tokyo: At the invitation-only Linux Kernel Maintainers Summit here, the top Linux maintainers decided, as Jonathan Corbet, Linux kernel developer, put it, "The consensus among the assembled developers is that Rust in the kernel is no longer experimental — it is now a core part of the kernel and is here to stay. So the 'experimental' tag will be coming off." As Linux kernel maintainer Steven Rosted told me, "There was zero pushback." This has been a long time coming. This shift caps five years of sometimes-fierce debate over whether the memory-safe language belonged alongside C at the heart of the world's most widely deployed open source operating system... It all began when Alex Gaynor and Geoffrey Thomas at the 2019 Linux Security Summit said that about two-thirds of Linux kernel vulnerabilities come from memory safety issues. Rust, in theory, could avoid these by using Rust's inherently safer application programming interfaces (API)... In those early days, the plan was not to rewrite Linux in Rust; it still isn't, but to adopt it selectively where it can provide the most security benefit without destabilizing mature C code. In short, new drivers, subsystems, and helper libraries would be the first targets... Despite the fuss, more and more programs were ported to Rust. By April 2025, the Linux kernel contained about 34 million lines of C code, with only 25 thousand lines written in Rust. At the same time, more and more drivers and higher-level utilities were being written in Rust. For instance, the Debian Linux distro developers announced that going forward, Rust would be a required dependency in its foundational Advanced Package Tool (APT). This change doesn't mean everyone will need to use Rust. C is not going anywhere. Still, as several maintainers told me, they expect to see many more drivers being written in Rust. In particular, Rust looks especially attractive for "leaf" drivers (network, storage, NVMe, etc.), where the Rust-for-Linux bindings expose safe wrappers over kernel C APIs. Nevertheless, for would-be kernel and systems programmers, Rust's new status in Linux hints at a career path that blends deep understanding of C with fluency in Rust's safety guarantees. This combination may define the next generation of low-level development work. Read more of this story at Slashdot.

  • Germany Covers Nearly 56 Percent of 2025 Electricity Use With Renewables
    by BeauHD on 13/12/2025 at 10:00 am

    Longtime Slashdot reader AmiMoJo shares a report from Clean Energy Wire: Renewable energy sources covered nearly 56 percent of Germany's gross electricity consumption in 2025, according to preliminary figures by energy industry group BDEW and research institute ZSW. Despite a 'historically weak' first quarter of the year for wind power production and a significant drop in hydropower output, the share of renewables grew by 0.7 percentage points compared to the previous year thanks to an increase in installed solar power capacity. Solar power output increased by 18.7 percent over the whole year, while the strong growth in installed capacity from previous years could be sustained, with more than 17 gigawatts (GW) added to the system. With March being the least windy month in Germany since records began in 1950, wind power output, on the other hand, faced a drop of 5.2 percent compared to 2024. However, stronger winds in the second and third quarter compensated for much of the early-year decrease. Onshore turbines with a capacity of 5.2 GW were added to the grid, a marked increase from the 3.3 GW in the previous year. Due to significantly less precipitation this year compared to 2024, hydropower output dropped by nearly one quarter (24.1%), while remaining only a fraction (3.2%) of total renewable power output. Read more of this story at Slashdot.

  • Chinese Whistleblower Living In US Is Being Hunted By Beijing With US Tech
    by BeauHD on 13/12/2025 at 7:00 am

    A former Chinese official who fled to the U.S. says Beijing has used advanced surveillance technology from U.S. companies to track, intimidate, and punish him and his family across borders. ABC News reports: Retired Chinese official Li Chuanliang was recuperating from cancer on a Korean resort island when he got an urgent call: Don't return to China, a friend warned. You're now a fugitive. Days later, a stranger snapped a photo of Li in a cafe. Terrified South Korea would send him back, Li fled, flew to the U.S. on a tourist visa and applied for asylum. But even there -- in New York, in California, deep in the Texas desert -- the Chinese government continued to hunt him down with the help of surveillance technology. Li's communications were monitored, his assets seized and his movements followed in police databases. More than 40 friends and relatives -- including his pregnant daughter -- were identified and detained, even by tracking down their cab drivers through facial recognition software. Three former associates died in detention, and for months shadowy men Li believed to be Chinese operatives stalked him across continents, interviews and documents seen by The Associated Press show. The Chinese government is using an increasingly powerful tool to cement its power at home and vastly amplify it abroad: Surveillance technology, much of it originating in the U.S., an AP investigation has found. Within China, this technology helped identify and punish almost 900,000 officials last year alone, nearly five times more than in 2012, according to state numbers. Beijing says it is cracking down on corruption, but critics charge that such technology is used in China and elsewhere to stifle dissent and exact retribution on perceived enemies. Outside China, the same technology is being used to threaten wayward officials, along with dissidents and alleged criminals, under what authorities call Operations "Fox Hunt" and "Sky Net." The U.S. has criticized these overseas operations as a "threat" and an "affront to national sovereignty." More than 14,000 people, including some 3,000 officials, have been brought back to China from more than 120 countries through coercion, arrests and pressure on relatives, according to state information. Read more of this story at Slashdot.

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