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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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  • Tesla's Electric Cybercab is Certified as the Most Efficient EV Ever
    by EditorDavid on 24/05/2026 at 3:34 am

    Tesla's upcoming Cybercab "has been certified at 165 Wh/mi," reports Electrek — which makes it "the most efficient electric vehicle ever produced — by a wide margin." The next most efficient EV on the market, the Lucid Air Pure, consumes 28% more energy per mile. Tesla VP of Vehicle Engineering Lars Moravy confirmed the figure, which represents a certified rating — not a marketing claim or internal target. It's an impressive achievement, but it comes with a massive asterisk: Tesla accomplished this by building a tiny two-seat robotaxi with no steering wheel, no pedals, and a sub-50 kWh battery pack... Even Tesla's own Model 3 — one of the most efficient passenger EVs you can buy — needs nearly a third more energy to cover the same distance... Where the 165 Wh/mi figure genuinely matters is in the economics of running a robotaxi fleet. Energy cost per mile is one of the biggest operating expenses for any ride-hailing service, and the Cybercab's efficiency gives Tesla a structural cost advantage over competitors... The small battery pack also means faster charging times and lower per-vehicle battery costs — both critical for fleet economics. Tesla has said the Cybercab will cost $30,000, and the efficient powertrain is a big part of hitting that price target. Tesla confirmed Cybercab production has started at Giga Texas in April, though the ramp is expected to be slow initially. The company still hasn't solved unsupervised autonomous driving — the first steering wheel-less unit rolled off the line in February, but Tesla's supervised robotaxi fleet currently crashes at roughly four times the rate of human drivers. Read more of this story at Slashdot.

  • Linus Torvalds on How AI is Impacting the Hunt for Linux Kernel Bugs
    by EditorDavid on 24/05/2026 at 1:34 am

    Linus Torvalds spoke this week at the Linux Foundation's Open Source Summit North America, reports ZDNet — and described how AI is impacting Linux kernel development: "In the last six months, we've seen a lot more commits," Torvalds noted, estimating that "the last two releases, it's been about 20% more commits than we had in the previous releases over many years.... The real change that happened in the last six months was that the AI tools actually got good enough for a lot of people... we're seeing a definite uptick in just development on pretty much all fronts...." On the positive side, he framed AI-discovered bugs as "short-term pain" with long-term benefits: "When AI finds a bug in any source code... long term is you found a bug, we fixed it, that the end result is better for it." After all, he continued, "I think finding bugs is great, because the real problem is all the bugs you didn't find..." For small teams or solo maintainers, he said, flood-style AI bug reports can cause real burnout, especially when "it's a bug report, and when you ask for more information, the person has done a drive-by and doesn't even answer your questions anymore." The AI news site Techstrong notes this quote from Torvalds. "I have a love-hate relationship with AI. I actually really like it from a technical angle, I love the tools, I find it very useful and interesting, but it is definitely causing pain points." The chief challenge with AI is that it forces people to change how they work, he found. People get into a rut, and AI challenges their norm. The Linux security mailing list got the brunt of this new wave of AI-generated commits. Not all bugs are security issues, but when "people think that when they find a bug with AI, the first reaction seems to sometimes be let's send it to the security list, because this may have security implications," Torvalds said. As a result, the security list — watched over by a small group of maintainers — was overrun by duplicate entries... The Linux project learned to manage the bug influx with a set number of tools to sort out and deprioritize the obvious drive-by reports (ones where the person submitting the report won't even answer any questions). One tool, Sashiko, reviews all the patches submitted on the mailing list. "Sometimes the review is not great, but quite often it finds issues and it asks questions and says, 'Hey, what about this issue?'" he said. Linux also updated their documentation, partly just to address "an uptick in bug and security reports from discoveries made in full or in part with AI." Read more of this story at Slashdot.

  • Is America Closer to Ending Daylight Saving Time?
    by EditorDavid on 23/05/2026 at 10:34 pm

    A proposal to make daylight saving time permanent has advanced in the U.S. House of Representative, reports California news station KCRA: A proposal to make daylight saving time permanent has advanced in the House, reigniting an age-old American debate around the twice-annual clock changes. And this time, the proposal has the president's backing. President Donald Trump said Thursday that he will work "very hard" to sign the so-called Sunshine Protection Act into law after the House Energy and Commerce Committee overwhelmingly approved the bill by a 48-1 vote. The bill still needs to pass the full U.S. House, and then the U.S. Senate would consider taking up the measure. The bill would allow U.S states to decide whether to "exempt themselves" from Daylight Saving Time, according to the article. The bill's sponsor described the annual clock-switching as "inconvenient, unnecessary, and out of step with the needs of today's families and economy," while finally creating a permanent Daylight Saving would bring "more usable daylight hours throughout the year." Read more of this story at Slashdot.

  • AMD (Xilinx) is Excluding Linux From the Free Tier For Its FPGA Dev Tool
    by EditorDavid on 23/05/2026 at 9:34 pm

    Long-time Slashdot reader Sun writes: AMD has announced a change to the way they are licensing Vivado, their FPGA development tool... Hidden between the lines of the announcement [of a new model starting with the 2026.1 release] is the change to the free of charge tier. AMD is adding more devices to be supported in this tier, which is supposedly the carrot. The stick, however, is the removal of certain debug features. The thing that's likely to hit the hobbist community the worst, however, is that the free tier will now not be available on Linux. AMD are saying that old licenses are still in effect, so it appears that if you hurry to install Vivado now, you'd still be able to use it moving forward. It is not clear, however, whether it'll still be possible to install Vivado 2025.2 after Vivado 2026.1 becomes available. "Almost all our surveys show... close to 70% of the customers are still using Windows," explained AMD senior product application engineer Anatoli Curran on the tool's support forum. "Vivado ML Standard Edition v2025.2 is going to be officially supported (I mean if there are any bugs found, these can be fixed) until v2026.3 release... Any release older than the current 3 released versions of Vivado then becomes unsupported (meaning no bugs will be fixed with Vivado Standard Edition v2025.2 after Vivado v2026.3). "However, users can continue using V2025.2 forever, if they wish to do so... Also, Vivado ML Standard Edition v2025.2 is license-free... Users only need to obtain and use any IP Core related licenses, or Vivado Model Composer (for SysGen)." Read more of this story at Slashdot.

  • US Layoffs Haven't Increased, and New Tech Industry Hiring Balances Firings
    by EditorDavid on 23/05/2026 at 8:34 pm

    "The numbers show that layoffs in the U.S. are roughly at or below levels from before the pandemic," reports the Washington Post, "although they are higher than in 2022 when businesses snapped up workers as the economy roared back to life... "A different measure that accounts for the growing U.S. workforce shows that layoffs affected about 1.2% of employed people in March, a number that has been steady for years outside of the pandemic..." In the technology industry, where Meta and other companies are regularly announcing job cuts, the layoff picture is complex. There has been a marked increase in layoffs in recent months in what the Labor Department calls the information industry, which includes employment of software developers and other tech workers. But Matthew Martin, senior U.S. economist at the research and consulting firm Oxford Economics, noted that hiring has also increased in that category, which includes media and entertainment. The combination of hiring minus layoffs in the information industry is effectively a wash, Martin said. Layoffs at Big Tech companies like Meta and other high-profile employers don't necessarily reflect what is happening in the country, Martin said, and draw far more attention than what may be slow and steady workforce growth. "There's a lot more headlines about job cuts than there are [about] expansion plans by businesses," he said. In his view, technology companies may be pushing out some workers and replacing them with people who have different skills as they respond to the demands of AI. It's true that businesses in some industries are devoting enormous sums of money and attention to AI. It's changing how some people work and a minority of American businesses are rolling out AI tools. But it's also become a trend for bosses to blame layoffs on the productive capabilities of AI and its ability to replace workers, even when job cuts may have little to do with the technology. Sam Altman, CEO of ChatGPT-maker OpenAI, has taken note of the pattern that he and others call "AI washing," essentially a high-tech form of whitewashing... "You know something is happening all the time when they have a word for it," said Gautam Mukunda, who teaches leadership at the Yale School of Management... AI-related employment changes are tiny so far, said Nathan Goldschlag, director of research at the Economic Innovation Group, a Washington think tank. He pointed to a recently published analysis of Census Bureau surveys, which found more than 95 percent of businesses that use AI said it hasn't changed their staff sizes — and AI-related employment increases were more common than decreases. Read more of this story at Slashdot.

  • Air France, Airbus Guilty of Corporate Manslaughter In 2009 Air France 447 Crash
    by EditorDavid on 23/05/2026 at 7:34 pm

    Long-time Slashdot reader UnknowingFool shares this report from the BBC: Air France and Airbus have been found guilty of manslaughter over a 2009 plane crash which killed 228 people. The Paris Appeals Court found the airline and aircraft manufacturer "solely and entirely responsible" for the incident, in which flight AF447 from Rio de Janeiro to Paris crashed into the Atlantic Ocean. The passenger jet stalled during a storm and plunged into the water, killing all on board. A court had previously cleared the companies in April 2023, but they were found guilty on Thursday after an eight-week trial. Both have repeatedly denied the charges and say they will appeal... The companies have been asked to pay the maximum fine — €225,000 ($261,720; £194,500) each — but some victims' families have criticised the amount as a token penalty... In 2012, French investigators found a combination of technical failure involving ice in the plane's sensors and the pilots' inability to react to the aircraft stalling led to it plunging into the sea. The captain was on a break when the co-pilots became confused by faulty air-speed readings. They then mistakenly pointed the nose of the plane upwards when it stalled, instead of down. Investigators concluded the co-pilots did not have the training to deal with the situation. Pilot training has since been improved and the speed sensors replaced. Read more of this story at Slashdot.

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