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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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  • T2 Linux Restores XAA In Xorg, Making 2D Graphics Fast Again
    by EditorDavid on 21/02/2026 at 7:35 pm

    Berlin-based T2 Linux developer René Rebe (long-time Slashdot reader ReneR) is announcing that their Xorg display server has now restored its XAA acceleration architecture, "bringing fixed-function hardware 2D acceleration back to many older graphics cards that upstream left in software-rendered mode." Older fixed-function GPUs now regain smooth window movement, low CPU usage, and proper 24-bit bpp framebuffer support (also restored in T2). Tested hardware includes ATi Mach-64 and Rage-128, SiS, Trident, Cirrus, Matrox (Millennium/G450), Permedia2, Tseng ET6000 and even the Sun Creator/Elite 3D. The result: vintage and retro systems and classic high-end Unix workstations that are fast and responsive again. Read more of this story at Slashdot.

  • The Salvation Army Opens a Digital Thrift Store On Roblox
    by EditorDavid on 21/02/2026 at 6:34 pm

    Slashdot reader BrianFagioli writes: The Salvation Army has launched what it calls the world's first digital thrift store inside Roblox, an experience named Thrift Score that lets players browse virtual racks and buy digital fashion for their avatars. While I understand the strategy of meeting Gen Z and Gen Alpha where they already spend time and money, I feel uneasy about turning something that, in the real world, often serves low income families in genuine need into a gamified aesthetic inside a video game, even if proceeds support rehabilitation and community programs, because a thrift store is not just a quirky brand concept but a lifeline for many people, and packaging that reality as entertainment creates a strange disconnect that is hard to ignore. "To be clear, proceeds from Thrift Score are intended to support The Salvation Armyâ(TM)s programs nationwide..." this article points out. "If it drives awareness and funds programs that help people in need, that is a win. But if it turns thrifting into just another cosmetic skin in a digital marketplace, then we should at least be willing to say that it feels off." Read more of this story at Slashdot.

  • Researchers Discover Ancient Bacteria Strain That Resists 10 Modern Antibiotics
    by EditorDavid on 21/02/2026 at 5:34 pm

    CNN reports on a 13,000-year-old glacier in a Romanian cave, where scientists say a bacterial strain they thawed and analyzed "is resistant to 10 modern antibiotics used to treat diseases such as urinary tract infections and tuberculosis." But there's no evidence the bacteria is harmful to humans, CNN notes, and "The scientists said the insights they have gained from the work may help in the fight against modern superbugs that can't be treated by commonly used antibiotics." Analysis of the Psychrobacter SC65A.3 genome revealed 11 genes that are potentially able to kill or stop the growth of other bacteria, fungi and viruses... Matthew Holland, a postdoctoral researcher in medicinal chemistry at the UK's University of Oxford, said that researchers were searching in new and extreme environments, such as ice caves and the seafloor, for biomolecules that could be developed into new antibiotic drugs. He was not involved in the new study. "The team in Romania found this particular bug had resistance to 10 reasonably advanced synthetic antibiotics and that in itself is interesting," he said. "But what they report as well is that it secreted molecules that were able to kill a variety of already resistant, harmful bacteria. "So the hope is that can we look at the molecules it makes and see if there's the possibility within those molecules to make new antibiotics." Read more of this story at Slashdot.

  • Is 'Brain Rot' Real? How Too Much Time Online Can Affect Your Mind.
    by EditorDavid on 21/02/2026 at 4:34 pm

    Can being "very online" really affect our brains, asks the Washington Post: Research suggests that scrolling through short videos on TikTok, Instagram or YouTube Shorts is affecting our attention, memory and mental health. A recent meta-analysis of the scientific literature found that increased use of short-form video was linked with poorer cognition and increased anxiety... In a 2025 study published in the journal Translational Psychiatry, researchers looked at longitudinal data from more than 7,000 children across the country and found that more screen use was associated with reduced cortical thickness in certain areas of the brain. The cortex, which is the outer layer that sits on top of our more primitive brain structures, allows for higher-level thinking, memory and decision-making. "We really need it for things like inhibitory control or not being so impulsive," said Mitch Prinstein, a senior science adviser to the American Psychological Association and professor of psychology and neuroscience at the University of North Carolina at Chapel Hill, who was not involved in the study. The cortex is also important for controlling addictive behaviors. "Those seem to be the areas being affected by the reduced cortical thickness," he said, explaining that impulsivity can prompt us to seek dopamine hits from social media. In the study, more screen time was also associated with more attention-deficit/hyperactivity disorder (ADHD) symptoms... But not all screen time is created equal. A recent study removed social media from kids' devices but let them use their phones for as long as they wanted. The result? Kids spent just as long on their phones but didn't have the same harmful effects. "It's what you're doing on the screen that matters," Prinstein said. Read more of this story at Slashdot.

  • How Python's Security Response Team Keeps Python Users Safe
    by EditorDavid on 21/02/2026 at 3:34 pm

    This week the Python Software Foundation explained how they keep Python secure. A new blog post recognizes the volunteers and paid Python Software Foundation staff on the Python Security Response Team (PSRT), who "triage and coordinate vulnerability reports and remediations keeping all Python users safe." Just last year the PSRT published 16 vulnerability advisories for CPython and pip, the most in a single year to date! And the PSRT usually can't do this work alone, PSRT coordinators are encouraged to involve maintainers and experts on the projects and submodules. By involving the experts directly in the remediation process ensures fixes adhere to existing API conventions and threat-models, are maintainable long-term, and have minimal impact on existing use-cases. Sometimes the PSRT even coordinates with other open source projects to avoid catching the Python ecosystem off-guard by publishing a vulnerability advisory that affects multiple other projects. The most recent example of this is PyPI's ZIP archive differential attack mitigation. This work deserves recognition and celebration just like contributions to source code and documentation. [Security Developer-in-Residence Seth Larson and PSF Infrastructure Engineer Jacob Coffee] are developing further improvements to workflows involving "GitHub Security Advisories" to record the reporter, coordinator, and remediation developers and reviewers to CVE and OSV records to properly thank everyone involved in the otherwise private contribution to open source projects. Read more of this story at Slashdot.

  • Hazardous Substances Found In All Headphones Tested By ToxFREE Project
    by BeauHD on 21/02/2026 at 1:00 pm

    An anonymous reader quotes a report from the Guardian: You wear them at work, you wear them at play, you wear them to relax. You may even get sweaty in them at the gym. But an investigation into headphones has found every single pair tested contained substances hazardous to human health, including chemicals that can cause cancer, neurodevelopmental problems and the feminization of males. [...] Researchers say that while individual doses from particular sources may be low, a "cocktail effect" of daily, multi-source exposure nevertheless poses potentially severe long-term risks to health. [...] Researchers bought 81 pairs of in-ear and over-ear headphones, either on the market in the Czech Republic, Slovakia, Hungary, Slovenia and Austria, or from the online marketplaces Shein and Temu, and took them for laboratory analysis, testing for a range of harmful chemicals. "Hazardous substances were detected in every product tested," they said. Bisphenol A (BPA) appeared in 98% of samples, and its substitute, bisphenol S (BPS), was found in more than three-quarters. Synthetic chemicals used to stiffen plastic, BPA and BPS mimic the action of oestrogen inside organisms, causing a range of adverse effects including the feminization of males, early onset puberty in girls, and cancer. Previous studies have shown that bisphenols can migrate from synthetic materials into sweat, and that they can be absorbed through the skin. "Given the prolonged skin contact associated with headphone use, dermal exposure represents a relevant pathway, and it is reasonable to assume that similar migration of BPA and its substitutes may occur from headphone components directly to the user's skin," the researchers said. Also found in the headphones tested were phthalates, potent reproductive toxins that can impair fertility; chlorinated paraffins, which have been linked to liver and kidney damage; and brominated and organophosphate flame retardants, which have similar endocrine disrupting properties to bisphenols. Most were, however, found in only trace quantities. Read more of this story at Slashdot.

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