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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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  • Japan's Space Agency Conducts First Test Flight For Experimental Reusable Rocket
    by EditorDavid on 13/07/2026 at 8:54 am

    "Japan's experimental reusable rocket took off and safely landed in a first test flight Saturday," reports the Associated Press, as Japan "seeks to achieve the technology key to cut launch costs and compete in the global space market dominated by SpaceX." The RV-X rocket lifted off, hovered and moved horizontally before landing [watch the video here] during its less than one-minute flight at the Japan Aerospace Exploration Agency's Noshiro Testing Center in northeastern Japan, which was livestreamed by the NVS, a group of space fans... Saturday's flight is a step forward for Japan in achieving the technology needed to develop a lower cost successor to the country's current mainstay, single-use H3 series. Japan's test comes the same week that China recovered an orbital booster rocket for the first time. Read more of this story at Slashdot.

  • America May Soon Be Facing It's Largest Labor Shortage in Its History
    by EditorDavid on 13/07/2026 at 4:54 am

    America "is facing what's projected to become the largest labor shortage in its history," according to experts interviewed by the Washington Post: Economists warn that the worsening labor problem, due in part to a skills shortage and population shifts, will be vast and reach beyond tech. It "could hobble the American economy for years to come," predicts the Georgetown University Center on Education and the Workforce. Lightcast, a labor market data company, calls it "the largest labor shortage the country has ever seen." JPMorgan Chase warns of a national security risk from "a pervasive talent deficit that constrains the nation's capacity to build, compete, and protect its interests." There will be shortages in the tens or even hundreds of thousands of nurses, physicians, teachers, engineers, pharmacists, mental health counselors, construction worker and airplane mechanics — jobs AI generally can't do... Among the trends that have been leading to this moment: a mismatch between the careers college graduates are pursuing and the jobs employers are struggling to fill. Far fewer students are majoring in health care fields than are needed to meet demand, for instance. "We have pumped so many young people into business and finance" when what's really in demand are graduates in other fields, [said Ron Hetrick, Lightcast's principal economist]. "It's like a factory producing these workers like widgets, even though society is saying, 'We really don't need them.' And the factory just keeps pumping them out." But the principal reason for the looming workforce shortages is much more basic. A protracted decline in birth rates is coinciding with a record wave of retirements, data shows. From 2024 to 2032, when the last baby boomers sign up for Social Security payments, more than 18 million college-educated workers will leave the labor force while fewer than 14 million enter it, according to the Georgetown center. Meanwhile, even as the number of people with associate and bachelor's degrees falls, the number of jobs requiring them will grow, the center forecasts. That will leave a gap of 4.6 million workers. Lightcast puts the deficit at an even higher 6 million... The effect of population shifts on the supply of talent, with or without degrees, has been compounded by a drop in the proportion of high school graduates choosing to go to college, a sharply reduced rate of immigration, and a growing number of Americans leaving the workforce altogether because of such issues as lack of child care, early retirement, incarceration and substance addiction, according to the Chamber of Commerce. Three interesting statistics from the article: U.S. college/university enrollment in 2023 was down by nearly 2 million students since its peak in 2010, according to the most recent data from the U.S. Education Department. America's low birth rate since 2010 "means the number of college-age Americans is forecast to decline by another 13 percent through 2041." South Dakota has just 41 workers for every 100 open jobs... while California and nine other states have more workers than jobs, the Chamber of Commerce found. Read more of this story at Slashdot.

  • Semi-Trailer Trucks Test Converting Into Plug-In Hybrids
    by EditorDavid on 13/07/2026 at 1:54 am

    Long-time Slashdot reader necro81 writes: There are several companies, such as Tesla, trying to make semi trucks fully electric. The capital cost for such a truck, and the MW-scale infrastructure to recharge it, may be a hard sell for some operators. [IEEE Spectrum notes that's a charging infrastructure "that most freight corridors do not yet reliably provide."] But some companies are instead adding batteries and an electric motor to the semi-trailers that trucks haul behind them. "The Nivalis Powered Trailer Kit centers on an electric axle [rated at 50 kilowatts-peak]... capable of both propulsion assistance and regenerative braking. It draws on a 60-kilowatt-hour, 400-volt lithium-ion battery pack charged from three sources: the axle itself during braking and deceleration, a full-rooftop array of photovoltaic panels generating up to 3.7 kilowatts-peak, and a 32-amp, three-phase AC grid connection available during parking stops." This approach is more akin to a plug-in hybrid: the truck may still be diesel-powered, but the electric assist from the trailer allows the truck to run more efficiently. Replacing diesel with kWh can save operators money while also reducing emissions. This incremental approach may be more accessible and less capital-intensive than replacing the truck itself. From the article: The driver's only window into the system is a small display readable from the cab's side mirror that shows the system status and battery charge level. Nothing about the trailer's handling or licensing requirements changes. The partners project savings of up to 7,000 liters of diesel per trailer per year, which is enough to keep about 19 tonnes of carbon dioxide out of the air... Trailer Dynamics, an Aachen-based company, has conducted field tests with BMW Logistics, DB Schenker, Duvenbeck, and Volkswagen Konzernlogistik, reporting average fuel savings of around 40% for diesel tractor combinations, substantially higher than the up to 18% reduction implied by the Nivalis projection... Trailer Dynamics prices its system between €145,000 and €195,000 and targets a payback period of no more than five years. Nivalis targets five to six years at current costs. Read more of this story at Slashdot.

  • 'Billionaire Exodus? California Drew 10x More Venture Capital Than Any Other State This Year'
    by EditorDavid on 12/07/2026 at 11:34 pm

    California drew more than $335 billion in venture capital funding this year, reports the Los Angeles Times, citing data released Thursday by PitchBook on private market funding: Its next biggest competitor, New York, raised less than a tenth of California's total. Texas raised 1/40th of the amount... Although a campaign for a new tax on billionaires has convinced some ultra-rich residents to shift to other states and businesses often complain that high property and energy costs and an anti-business regulatory regime make it too tough to make money in the state, the inability of the top talent, companies and investors in AI to set up elsewhere shows California's enduring attraction. The state's economy grew 5% last year to a record $4.25 trillion, making it larger than every country other than the U.S., China and Germany. It is home to nearly 400 billion-dollar startups — more than any other state, according to CB Insights... Among metropolitan regions, Los Angeles ranked behind only Silicon Valley and New York, which attracted $98 billion and $11.5 billion in venture investment, respectively... Investors poured in nearly $8 billion across 207 deals in the Los Angeles, Long Beach, and Santa Ana metro areas, up 28% from a year earlier, according to PitchBook... Nearly 90% of invested dollars [in California] went to AI firms, up from last year, when around 65% of new funds were allocated to AI. "If you're a tech company and you're not an AI company, you have a very, very difficult opportunity ahead of you to raise capital," Stanford said. Read more of this story at Slashdot.

  • 'Forget Coders. The Real AI Threat Is In the Back Office'
    by EditorDavid on 12/07/2026 at 10:29 pm

    Which jobs are most threatened by AI? "Programmers, software engineers and other tech industry employees," goes one common answer. "But many economists are more concerned about a different, larger group of white-collar workers," reports the New York Times: customer service reps, bookkeepers, payroll clerks and HR specialists, "who fly under the radar but collectively account for tens of millions of jobs..." They are spread across the country and throughout the economy, working in every industry, in big cities and small towns, at major corporations and mom-and-pop businesses... These jobs typically offer a middle-class salary or a pathway to achieving one — much as manufacturing jobs did for men before decades of globalisation and automation wiped many of them away... For now, such an outcome is a fear, not a forecast. Despite high-profile layoffs in tech and finance, there is little firm evidence that AI has hurt the labour market as a whole. Economists have become increasingly convinced that disruptions are likely, but they say it is too early to know where or how widespread they will be. They remain broadly sceptical of claims that the technology will lead to mass unemployment in the near future. Some AI industry leaders have walked back such predictions in recent weeks. But given the extraordinary pace at which companies are adopting AI — and at which the technology is improving — economists say policymakers need to consider the potential effects on the labour market. And they say they are concerned that the public debate has focused too much on software engineers and a relative handful of other high-status careers — lawyers, consultants, economists — rather than the workers who could be most vulnerable... Economists at Northwestern University recently recalculated measures of AI exposure based on the makeup of the total workforce, not just the people using the technology. Administrative and front-line roles, such as customer service representatives, rose to the top of the list. "The most affected jobs are secretaries, are routine clerks," said Michelle Yin, one of the working paper's authors. "They're not computer scientists or data scientists at all." The article also includes this counterpoint from an economist at the University of Illinois who has studied earlier waves of white-collar automation: that like other disruptive technologies, AI likely will also create new jobs. So the possibility exists AI will make workers more productive and allow them to earn more. "I would be cautious about just focusing on what are we losing as opposed to what are we going to gain on the other side." Read more of this story at Slashdot.

  • Linus Torvalds on AI, Junk Patches, Humans, and Godzilla
    by EditorDavid on 12/07/2026 at 8:55 pm

    Linus Torvalds once said LLMs might bring a 10X increase to programmer productivity. But speaking at Open Source Summit India 2026, he now says that number was "not scientific," reports ZDNet. "That was pulled out of my ass number, obviously." Today, he continued, "we're at the point where hopefully it creates more productivity than it takes away," but "we certainly saw more junk being generated by LLMs than we saw useful code up until the like early this year.... it can actually be a huge drain on resources when it takes humans a lot of effort to figure out that, hey, this machine-generated report was not true." Even now, he said, "most of the good ones require more than just the LLM," because "we've had to push back quite a bit... if you find a bug with an LLM, it's not enough to just ask the LLM to make a bug report and then throw it over the fence to us. We want to see a suggested patch; we want to see the human who ran the LLM act as a kind of back-and-forth." Torvalds described many AI-generated patches as "mindless band-aid kind of patches... they may fix the immediate problem, but the kind of bug remains, and it just is waiting in the hallway to hit you in another place." For his own toy projects, he uses LLMs as prototypers: "I use them as a way to prototype things... quite often the code is not usable in that form, but it's a great way to try something out," while insisting that for kernel-level fixes, "LLMs, in my experience, have not been at that level yet." Torvalds acknowledged that some AI-found issues have been "absolutely, stunningly, I mean, interesting in a painful kind of way," especially security problems that "show up in the technology press two days later." Despite the embarrassment, he said, "I'm very much not a shoot-the-messenger kind of person. I think we're much better off with LLMs finding bugs, even when they are embarrassing, and they are things that we should probably have found two decades ago." Torvalds also said he's using AI "for my own toy projects... Every time I travel to some new place, and this is the first time I've been to India, I send the kids pictures of where I am, and for some strange reason, Godzilla seems to follow me around and gets added to those pictures." ZDNet notes that Torvalds concluded, "There are many useful and less useful uses for AI," and "I think Godzilla is a great place to stop." Thanks to Slashdot reader joshuark for sharing the article. Read more of this story at Slashdot.

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