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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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  • Researchers Make 'Neuromorphic' Artificial Skin For Robots
    by BeauHD on 30/12/2025 at 3:33 am

    An anonymous reader quotes a report from Ars Technica: The nervous system does an astonishing job of tracking sensory information, and does so using signals that would drive many computer scientists insane: a noisy stream of activity spikes that may be transmitted to hundreds of additional neurons, where they are integrated with similar spike trains coming from still other neurons. Now, researchers have used spiking circuitry to build an artificial robotic skin, adopting some of the principles of how signals from our sensory neurons are transmitted and integrated. While the system relies on a few decidedly not-neural features, it has the advantage that we have chips that can run neural networks using spiking signals, which would allow this system to integrate smoothly with some energy-efficient hardware to run AI-based control software. [...] There are four ways that these trains of spikes can convey information: the shape of an individual pulse, through their magnitude, through the length of the spike, and through the frequency of the spikes. Spike frequency is the most commonly used means of conveying information in biological systems, and the researchers use that to convey the pressure experienced by a sensor. The remaining forms of information are used to create something akin to a bar code that helps identify which sensor the reading came from. In addition to registering the pressure, the researchers had each sensor send a "I'm still here" signal at regular time intervals. Failure to receive this would be an indication that something has gone wrong with a sensor. The spiking signals allow the next layer of the system to identify any pressure being experienced by the skin, as well as where it originated. This layer can also do basic evaluation of the sensory input: "Pressure-initiated raw pulses from the pulse generator accumulated in the signal cache center until a predefined pain threshold is surpassed, activating a pain signal." This can allow the equivalent of basic reflex reactions that don't involve higher-level control systems. For example, the researchers set up a robotic arm covered with their artificial skin, and got it to move the arm whenever it experiences pressure that can cause damage. The second layer also combines and filters signals from the skin before sending the information on to the arm's controller, which is the equivalent of the brain in this situation. So, the same system caused a robotic face to change expressions based on how much pressure its arm was sensing. [...] The skin is designed to be assembled from a collection of segments that can snap together using magnetic interlocks. These automatically link up any necessary wiring, and each segment of skin broadcasts a unique identity code. So, if the system identifies damage, it's relatively easy for an operator to pop out the damaged segment and replace it with fresh hardware, and then update any data that links the new segment's ID with its location. The researchers call their development a neuromorphic robotic e-skin, or NRE-skin. "Neuromorphic" as a term is a bit vague, with some people using it to mean a technology that directly follows the principles used by the nervous system. That's definitely not this skin. Instead, it uses "neuromorphic" far more loosely, with the operation of the nervous system acting as an inspiration for the system.The findings have been published in the journal PNAS. Read more of this story at Slashdot.

  • Russian Enthusiasts Planning DIY DDR5 Memory Amidst Worldwide Shortage
    by BeauHD on 30/12/2025 at 2:02 am

    Amid a global DDR5 shortage and soaring prices, Russian hardware enthusiasts are experimenting with do-it-yourself DDR5 RAM by sourcing empty PCBs and soldering memory chips by hand. Tom's Hardware reports: The idea comes from Russian YouTuber PRO Hi-Tech's Telegram channel, where a local enthusiast known as "Vik-on" already performs VRAM upgrades for GPUs, so this is a relatively safe operation for him. According to Vik-on, empty RAM PCBs can be sourced from China for as little as $6.40 per DIMM. The memory chips themselves, though, that's a different challenge. The so-called spot market for memory doesn't really exist at the moment, since no manufacturer has the production capacity to make more RAM, and even if they did, they'd sell to better-paying AI clients instead. Still, you can find SK Hynix and Samsung chips across Chinese marketplaces if you search for the correct part number, as shown in the attached screenshots. Moreover, the Telegram thread says it would cost roughly 12,000 Russian Rubles ($152) to build a 16 GB stick with "average" specs, which is about the same as a retail 16 GB kit. There's also a ZenTimings snapshot showing CL28 timings, claiming that even relatively high-end DDR5 RAM can be built using this method, but it won't be cost-effective. Therefore, it doesn't make too much sense just yet to get the BGA rework station out and assemble your own DDR5. Things are expected to get worse, though, so maybe these Russians are on to something. Read more of this story at Slashdot.

  • Fedora Continued At The Forefront Of Upstream Linux Innovations In 2025
    by BeauHD on 30/12/2025 at 1:25 am

    Phoronix's Michael Larabel is "reliving some of the best moments for Fedora Linux in 2025" by highlighting the year's most popular news around the distro. Throughout 2025, Fedora continued to lead upstream Linux innovation with bold changes like Wayland-only GNOME, newer kernels, architecture cleanups, and experimental features -- while openly grappling with controversial shifts such as dropping 32-bit support and modernizing long-standing subsystems. "Fedora Linux this year continued in punctually shipping the very latest upstream Linux innovations from the freshest Wayland components to Linux kernel features and continuing to leverage other improvements in the open-source world," writes Larabel. "Fedora enjoyed the successful Fedora 42 and Fedora 43 releases this year, including going with Wayland-noly GNOME and further phasing of 32-bit packages. Fedora's KDE spin continued improving too and the Red Hat sponsored Linux distribution enjoyed a wealth of other improvements this year." Read more of this story at Slashdot.

  • 'Pull Over and Show Me Your Apple Wallet'
    by BeauHD on 30/12/2025 at 12:45 am

    Longtime Slashdot reader theodp writes: MacRumors reports that Apple plans to expand iPhone and Apple Watch driver's licenses to 7 U.S. states (CT, KY, MS, OK, UT, AR, VA). A recent convert is the State of Illinois, whose website videos demo how you can use your Apple Wallet license to display proof of identity or age the next time you get carded by a cop, bartender, or TSA agent. The new states will join 13 others who already offer driver's licenses in the Wallet app (AZ, MD, CO, GA, OH, HI, CA, IA, NM, MT, ND, WV, IL). There's certainly been a lot of foot-dragging by the states when it comes to embracing phone-based driver's licenses -- Slashdot reported that Iowa was ready to launch a mobile driver's license in 2014; they didn't get one until nearly a decade later, in late 2023. Read more of this story at Slashdot.

  • Tough Job Market Has People Using Dating Apps To Get Interviews
    by BeauHD on 30/12/2025 at 12:02 am

    An anonymous reader quotes a report from Bloomberg: Most people use dating apps to find love. Tiffany Chau used one to hunt for a summer internship. This fall, the 20-year-old junior at California College of the Arts tailored her Hinge profile to connect with people who could offer job referrals or interviews. One match brought her to a Halloween party, where she networked in hopes of landing a product-design internship for the summer. While there, she got some tips from someone who had recently interviewed at Accenture. As for the connection with her date? Not so much. "I feel like my approach to the dating apps is it being another networking platform like everything else, like Instagram or LinkedIn," Chau said. Chau is among a cadre of workers who are using dating apps to boost their job searches. They're recognizing that the online job hunt is broken as unemployed workers flood the system, AI screens out resumes and many job matching programs are overwhelmed. Automation has squeezed human contact out of hiring, which has pushed applicants to seek any path to a live hiring manager, no matter the means. The overall US unemployment rate continued to climb throughout 2025, reaching 4.6%, according to the Bureau of Labor Statistics. And while the number of unemployed high school graduates held steady at about 4.4% in November, the rate for workers with a bachelor's degree rose to 2.9% from 2.5% a year ago. About a third of dating app users said they had sought matches for job hook-ups, according to a ResumeBuilder.com survey of about 2,200 US dating site customers in October. Two-thirds targeted potential paramours who worked at a desirable employer. Three-quarters said they matched with people working in roles they wanted. "People are doing it to expand their networks, make connections, because the best way to get a job today is who you know," said Stacie Haller, ResumeBuilder.com's chief career advisor. "Networking is the only way people are rising above the horror show that the job search is today." Read more of this story at Slashdot.

  • Sam Altman Offers $555K Salary To Fill Most Daunting Role In AI
    by BeauHD on 29/12/2025 at 11:20 pm

    OpenAI is offering a $555,000 salary (plus equity) to recruit a new "head of preparedness," a high-pressure role tasked with anticipating and mitigating extreme AI risks. "This will be a stressful job, and you'll jump into the deep end pretty much immediately," said Sam Altman as he launched the hunt to fill "a critical role" to "help the world." The Guardian reports: In what may be close to the impossible job, the "head of preparedness" at OpenAI will be directly responsible for defending against risks from ever more powerful AIs to human mental health, cybersecurity and biological weapons. That is before the successful candidate has to start worrying about the possibility that AIs may soon begin training themselves amid fears from some experts they could "turn against us." The successful candidate will be responsible for evaluating and mitigating emerging threats and "tracking and preparing for frontier capabilities that create new risks of severe harm." Some previous executives in the post have lasted only for short periods. Altman said on X as he launched the job search: "We have a strong foundation of measuring growing capabilities, but we are entering a world where we need more nuanced understanding and measurement of how those capabilities could be abused, and how we can limit those downsides both in our products and in the world, in a way that lets us all enjoy the tremendous benefits. These questions are hard and there is little precedent." One user responded sardonically: "Sounds pretty chill, is there vacation included?" What is included is an unspecified slice of equity in OpenAI, a company that has been valued at $500 billion. Read more of this story at Slashdot.

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