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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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  • How Long Does It Take to Fix Linux Kernel Bugs?
    by EditorDavid on 12/01/2026 at 5:44 am

    An anonymous reader shared this report from It's FOSS: Jenny Guanni Qu, a researcher at [VC fund] Pebblebed, analyzed 125,183 bugs from 20 years of Linux kernel development history (on Git). The findings show that the average bug takes 2.1 years to find. [Though the median is 0.7 years, with the average possibly skewed by "outliers" discovered after years of hiding.] The longest-lived bug, a buffer overflow in networking code, went unnoticed for 20.7 years! [But 86.5% of bugs are found within five years.] The research was carried out by relying on the Fixes: tag that is used in kernel development. Basically, when a commit fixes a bug, it includes a tag pointing to the commit that introduced the bug. Jenny wrote a tool that extracted these tags from the kernel's git history going back to 2005. The tool finds all fixing commits, extracts the referenced commit hash, pulls dates from both commits, and calculates the time frame. As for the dataset, it includes over 125k records from Linux 6.19-rc3, covering bugs from April 2005 to January 2026. Out of these, 119,449 were unique fixing commits from 9,159 different authors, and only 158 bugs had CVE IDs assigned. It took six hours to assemble the dataset, according to the blog post, which concludes that the percentage of bugs found within one year has improved dramatically, from 0% in 2010 to 69% by 2022. The blog post says this can likely be attributed to: The Syzkaller fuzzer (released in 2015) Dynamic memory error detectors like KASAN, KMSAN, KCSAN sanitizers Better static analysis More contributors reviewing code But "We're simultaneously catching new bugs faster AND slowly working through ~5,400 ancient bugs that have been hiding for over 5 years." They've also developed an AI model called VulnBERT that predicts whether a commit introduces a vulnerability, claiming that of all actual bug-introducing commits, it catches 92.2%. "The goal isn't to replace human reviewers but to point them at the 10% of commits most likely to be problematic, so they can focus attention where it matters..." Read more of this story at Slashdot.

  • Amazon's AI Tool Listed Products from Small Businesses Without Their Knowledge
    by EditorDavid on 12/01/2026 at 3:09 am

    Bloomberg reports on Amazon listings "automatically generated by an experimental AI tool" for stores that don't sell on Amazon. Bloomberg notes that the listings "didn't always correspond to the correct product", leaving the stores to handle the complaints from angry customers: Between the Christmas and New Year holidays, small shop owners and artisans who had found their products listed on Amazon took to social media to compare notes and warn their peers... In interviews, six small shop owners said they found themselves unwittingly selling their products on Amazon's digital marketplace. Some, especially those who deliberately avoided Amazon, said they should have been asked for their consent. Others said it was ironic that Amazon was scouring the web for products with AI tools despite suing Perplexity AI Inc.for using similar technology to buy products on Amazon... Some retailers say the listings displayed the wrong product image or mistakenly showed wholesale pricing. Users of Shopify Inc.'s e-commerce tools said the system flagged Amazon's automated purchases as potentially fraudulent... In a statement, Amazon spokesperson Maxine Tagay said sellers are free to opt out. Two Amazon initiatives — Shop Direct, which links out to make purchases on other retailers' sites, and Buy For Me, which duplicates listings and handles purchases without leaving Amazon — "are programs we're testing that help customers discover brands and products not currently sold in Amazon's store, while helping businessesâreach new customers and drive incremental sales," she said in an emailed statement. "We have received positive feedback on these programs." Tagay didn't say why the sellers were enrolled without notifying them. She added that the Buy For Me selection features more than 500,000 items, up from about 65,000 at launch in April. The article includes quotes from the owners of affected businesses. A one-person company complained that "If suddenly there were 100 orders, I couldn't necessarily manage. When someone takes your proprietary, copyrighted works, I should be asked about that. This is my business. It's not their business." One business owner said "I just don't want my products on there... It's like if Airbnb showed up and tried to put your house on the market without your permission." One business owner complained "When things started to go wrong, there was no system set up by Amazon to resolve it. It's just 'We set this up for you, you should be grateful, you fix it.'" One Amazon representative even suggested they try opening a $39-a-month Amazon seller account. Read more of this story at Slashdot.

  • Finnish Startup IXI Plans New Autofocusing Eyeglasses
    by EditorDavid on 11/01/2026 at 11:29 pm

    An anonymous reader shared this report from CNET: Finland-based IXI Eyewear has raised more than $40 million from investors, including Amazon, to build glasses with adaptive lenses that could dynamically autofocus based on where the person wearing them is looking. In late 2025, the company said it had developed a glasses prototype that weighs just 22 grams. It includes embedded sensors aimed at the wearer's eyes and liquid crystal lenses that respond accordingly. According to the company, the autofocus is "powered by technology hidden within the frame that tracks eye movements and adjusts focus instantly — whether you're looking near or far..." iXI told CNN in a story published on Tuesday that it expects to launch its glasses within the next year. It has a waitlist for the glasses on its website, but has not said in what regions they'll be available... This type of technology is also being pursued by Japanese startups Elcyo and Vixion. Vixion already has a product with adaptive lenses embedded in the middle of the lenses (they do not resemble standard glasses). CNET spoke to optometrist Meenal Agarwal, who pointed out that besides startup efforts, there have also been research prototypes like Stanford's autofocal glasses. "But none have consumer-ready, lightweight glasses in the market yet." CNN reports on the 75-person company's product, noting that "By using a dynamic lens, IXI does away with fixed magnification areas." "Modern varifocals have this narrow viewing channel because they're mixing basically three different lenses," said Niko Eiden, CEO of IXI... So, there are areas of distortion, the sides of the lenses are quite useless for the user, and then you really have to manage which part of this viewing channel you're looking at." The IXI glasses, Eiden said, will have a much larger "reading" area for close-up vision — although still not as large as the entire lens — and it will also be positioned "in a more optimal place," based on the user's standard eye exam. But the biggest plus, Eiden added, is that most of the time, the reading area simply disappears, leaving the main prescription for long distance on the entire lens. "For seeing far, the difference is really striking, because with varifocals you have to look at the top part of the lens in order to see far. With ours, you have the full lens area to see far..." The new glasses won't come without drawbacks, Eiden admits: "This will be yet another product that you need to charge," he said. Although the charging port is magnetic and cleverly hidden in the temple area, overnight charging will be required... Another limitation is that more testing is required to make the glasses safe for driving, Eiden said, adding that in case of a malfunction of the electronics or the liquid crystal area, the glasses are equipped with a failsafe mode that shuts them down to the base state of the main lens, which would usually be distance vision, without creating any visual disturbances. Read more of this story at Slashdot.

  • Nvidia CEO Jensen Huang Says AI Doomerism Has 'Done a Lot of Damage'
    by EditorDavid on 11/01/2026 at 10:29 pm

    Nvidia CEO Jensen Huang "said one of his biggest takeaways from 2025 was 'the battle of narratives' over the future of AI development between those who see doom on the horizon and the optimists," reports Business Insider. Huang did acknowledge that "it's too simplistic" to entirely dismiss either side (on a recent episode of the "No Priors" podcast). But "I think we've done a lot of damage with very well-respected people who have painted a doomer narrative, end of the world narrative, science fiction narrative." "It's not helpful to people. It's not helpful to the industry. It's not helpful to society. It's not helpful to the governments..." [H]e cited concerns about "regulatory capture," arguing that no company should approach governments to request more regulation. "Their intentions are clearly deeply conflicted, and their intentions are clearly not completely in the best interest of society," he said. "I mean, they're obviously CEOs, they're obviously companies, and obviously they're advocating for themselves..." "When 90% of the messaging is all around the end of the world and the pessimism, and I think we're scaring people from making the investments in AI that makes it safer, more functional, more productive, and more useful to society," he said. Elsewhere in the podcast, Huang argues that the AI bubble is a myth. Business Insider adds that "a spokesperson for Nvidia declined to elaborate on Huang's remarks." Thanks to Slashdot reader joshuark for sharing the article. Read more of this story at Slashdot.

  • How Many Years Left Until the Hubble Space Telescope Reenters Earth's Atmosphere?
    by EditorDavid on 11/01/2026 at 9:29 pm

    "The clock is ticking" on the Hubble Space Telescope, writes the space news site Daily Galaxy, citing estimates from the unofficial "Hubble Reentry Tracker" site (which uses orbital data from the site space-track.org, created by tech integrator SAIC): While Hubble was initially launched into low Earth orbit at an altitude of around 360 miles, it has since descended to approximately 326 miles, and it continues to fall... "The solar flux levels are currently longer in duration and more elevated than previously anticipated, resulting in an earlier reentry forecast for the Hubble Space Telescope if no reboost mission is conducted," Hubble Reentry Trackersays the Hubble Reentry Tracker... ["Hubble has been reboosted three times in its history," the site points out, "all by servicing missions using the Space Shuttle."] NASA partnered with SpaceX in 2022 to explore the feasibility of raising Hubble to its original altitude of 373 miles. Such an adjustment would have bought Hubble a few more years in orbit. However, the future of this plan remains uncertain, as NASA has not made any official announcements to move forward with it... Solar flux levels, which determine atmospheric drag, have increased in recent years, accelerating the telescope's decline. This change in solar behavior means that the possibility of Hubble reentering Earth's atmosphere in the next five to six years is quite high if no corrective action is taken. ["But it is difficult to estimate this value due to the variability of future solar flux," the site cautions. "In the best case, Hubble may not reenter for 15 more years, around 2040. In the worst case, it could reenter in 4 years..."] Once Hubble reaches an altitude of 248 miles, it is expected that it will have less than a year before reentry... While Hubble's end may be near, there is a promising new project on the horizon: Lazuli, a privately-funded space telescope funded by former Google CEO Eric Schmidt. Lazuli aims to become the first privately-funded space telescope, and it could be the successor Hubble enthusiasts have been hoping for. Schmidt Sciences, the organization behind the telescope, plans to launch Lazuli by 2028, providing a more modern alternative to Hubble with a larger mirror and enhanced capabilities. The telescope's proposed design includes a 94-inch-wide mirror, which is a significant upgrade from Hubble's 94.5-inch mirror, and will feature updated instruments to capture more detailed data than ever before. Read more of this story at Slashdot.

  • Walmart Announces Drone Delivery, Integration with Google's AI Chatbot Gemini
    by EditorDavid on 11/01/2026 at 8:29 pm

    Alphabet-owned Wing "is expanding its drone delivery service to an additional 150 Walmart stores across the U.S.," reports Axios: [T]he future is already here if you live in Dallas — where some Walmart customers order delivery by Wing three times a week. By the end of 2026, some 40 million Americans, or about 12 percent of the U.S. population, will be able to take advantage of the convenience, the companies claim... Once the items are picked and packed in a small cardboard basket, they are loaded onto a drone inside a fenced area in the Walmart parking lot. Drones fly autonomously to the designated address, with human pilots monitoring each flight from a central operations hub.... For now, Wing deliveries are free. "The goal is to expose folks to the wonders of drone delivery," explains Wing's chief business officer, Heather Rivera... Over time, she said Wing expects delivery fees to be comparable to other delivery options, but faster and more convenient. Service began recently in Atlanta and Charlotte, and it's coming soon to Los Angeles, Houston, Cincinnati, St. Louis, Miami and other major U.S. cities to be announced later, according to the article. "By 2027, Walmart and Wing say they'll have a network of more than 270 drone delivery locations nationwide." Walmart also announced a new deal today with Google's Gemini, allowing customers to purchase Walmart products from within Gemini. (Walmart announced a similar deal for ChatGPT in October.) Slashdot reader BrianFagioli calls this "a defensive angle that Walmart does not quite say out loud." As AI models answer more questions directly, retailers risk losing customers before they ever hit a website. If Gemini recommends a product from someone else first, Walmart loses the sale before it starts. By planting itself inside the AI, Walmart keeps a seat at the table while the internet shifts under everyone's feet. Google clearly benefits too. Gemini gets a more functional purpose than just telling you how to boil pasta or summarize recipes. Now it can carry someone from the moment they wonder what they need to the moment the order is placed. That makes the assistant stickier and a bit more practical than generic chat. Walmart's incoming CEO John Furner says the company wants to shape this new pattern instead of being dragged into it later. Sundar Pichai calls Walmart an early partner in what he sees as a broader wave of agent style commerce, where AI starts doing the errands people used to handle themselves. The article concludes "This partnership serves as a snapshot of where retail seems to be heading..." Read more of this story at Slashdot.

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