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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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  • Military Planners Dread the Arctic, 'Where Drones Drop Dead and GPS Goes Haywire'
    by EditorDavid on 28/12/2025 at 4:44 am

    An anonymous reader shared this report from the Wall Street Journal: Sending drones and robots into battle, rather than humans, has become a tenet of modern warfare. Nowhere does that make more sense than in the frozen expanses of the Arctic. But the closer you get to the North Pole, the less useful cutting-edge technology becomes. Magnetic storms distort satellite signals; frigid temperatures drain batteries or freeze equipment in minutes; navigation systems lack reference points on snowfields. During a seven-nation polar exercise in Canada earlier this year to test equipment worth millions of dollars, the U.S. military's all-terrain arctic vehicles broke down after 30 minutes because hydraulic fluids congealed in the cold. Swedish soldiers participating in the exercise were handed $20,000 night-vision optics that broke because the aluminum in the goggles couldn't handle the minus 40 degree Fahrenheit conditions.... An arctic conflict would force war planners back to basics. Extreme cold makes the most common components brittle. Low temperatures alter the physical properties of rubber, causing seals to lose their elasticity and leak. Traces of water or humidity freeze into ice crystals that can scratch pumps and create blockages. Wires should be insulated with silicone rather than PVC, which can crack. Oil and other lubricants thicken and congeal. In most standard hydraulic systems, fluid becomes syrupy and can affect everything from aircraft controls to missile launchers and radar masts. A single freeze-up can knock out an entire weapons platform or immobilize a convoy. Even the Aurora Borealis interferes with radio communications and satellite-navigation systems, according to the article. Read more of this story at Slashdot.

  • OpenAI is Hiring a New 'Head of Preparedness' to Predict/Mitigate AI's Harms
    by EditorDavid on 28/12/2025 at 1:34 am

    An anonymous reader shared this report from Engadget: OpenAI is looking for a new Head of Preparedness who can help it anticipate the potential harms of its models and how they can be abused, in order to guide the company's safety strategy. It comes at the end of a year that's seen OpenAI hit with numerous accusations about ChatGPT's impacts on users' mental health, including a few wrongful death lawsuits. In a post on X about the position, OpenAI CEO Sam Altman acknowledgedthat the "potential impact of models on mental health was something we saw a preview of in 2025," along with other "real challenges" that have arisen alongside models' capabilities. The Head of Preparedness "is a critical role at an important time," he said. Per the job listing, the Head of Preparedness (who will make $555K, plus equity), "will lead the technical strategy and execution of OpenAI's Preparedness framework, our framework explaining OpenAI's approach to tracking and preparing for frontier capabilities that create new risks of severe harm." "These questions are hard," Altman posted on X.com, "and there is little precedent; a lot of ideas that sound good have some real edge cases... This will be a stressful job and you'll jump into the deep end pretty much immediately." The listing says OpenAI's Head of Preparedness "will lead a small, high-impact team to drive core Preparedness research, while partnering broadly across Safety Systems and OpenAI for end-to-end adoption and execution of the framework." They're looking for someone "comfortable making clear, high-stakes technical judgments under uncertainty." Read more of this story at Slashdot.

  • Researchers Show Some Robots Can Be Hijacked Just Through Spoken Commands
    by EditorDavid on 27/12/2025 at 11:44 pm

    An anonymous Slashdot reader shared this story from Interesting Engineering: Cybersecurity specialists from the research group DARKNAVY have demonstrated how modern humanoid robots can be compromised and weaponised through weaknesses in their AI-driven control systems. In a controlled test, the team demonstrated that a commercially available humanoid robot could be hijacked with nothing more than spoken commands, exposing how voice-based interaction can serve as an attack vector rather than a safeguard, reports Yicaiglobal... Using short-range wireless communication, the hijacked machine transmitted the exploit to another robot that was not connected to the network. Within minutes, this second robot was also taken over, demonstrating how a single breach could cascade through a group of machines. To underline the real-world implications, the researchers issued a hostile command during the demonstration. The robot advanced toward a mannequin on stage and struck it, illustrating the potential for physical harm. Read more of this story at Slashdot.

  • New Runtime Standby ABI Proposed for Linux Like Microsoft Windows' 'Modern Standby'
    by EditorDavid on 27/12/2025 at 10:34 pm

    Phoronix reports on "an exciting post-Christmas patch series out on the Linux kernel mailing list" proposing "a new runtime standby ABI that is similar in nature to the 'Modern Standby' functionality found with Microsoft Windows..." Modern Standby is a low-power mode on Windows 11 for letting systems remain connected to the network and appear "sleeping" but will allow for instant wake-up for notifications, music playback, and other functionality. The display is off, the network remains online, and background tasks can wake-up the system if needed with Microsoft Modern Standby... "This series introduces a new runtime standby ABI to allow firing Modern Standby firmware notifications that modify hardware appearance from userspace without suspending the kernel," [according to the email about the proposed patch series]. "This allows userspace to set the inactivity state of the device so that it looks like it is asleep (e.g., flashing the power button) while still being able to perform basic computations..." Those interested can see the RFC patch series for the work in its current form, in particular the documentation patch outlines the proposed /sys/power/standby interface. Read more of this story at Slashdot.

  • Is Russia Developing an Anti-Satellite Weapon to Target Starlink?
    by EditorDavid on 27/12/2025 at 9:34 pm

    An anonymous reader shared this report from the Associated Press: Two NATO-nation intelligence services suspect Russia is developing a new anti-satellite weapon to target Elon Musk's Starlink constellation with destructive orbiting clouds of shrapnel, with the aim of reining in Western space superiority that has helped Ukraine on the battlefield. Intelligence findings seen by The Associated Press say the so-called "zone-effect" weapon would seek to flood Starlink orbits with hundreds of thousands of high-density pellets, potentially disabling multiple satellites at once but also risking catastrophic collateral damage to other orbiting systems. Analysts who haven't seen the findings say they doubt such a weapon could work without causing uncontrollable chaos in space for companies and countries, including Russia and its ally China, that rely on thousands of orbiting satellites for communications, defense and other vital needs. Such repercussions, including risks to its own space systems, could steer Moscow away from deploying or using such a weapon, analysts said. "I don't buy it. Like, I really don't," said Victoria Samson, a space-security specialist at the Secure World Foundation who leads the Colorado-based nongovernmental organization's annual study of anti-satellite systems. "I would be very surprised, frankly, if they were to do something like that." [Later they suggested the research might just be experimental.] But the commander of the Canadian military's Space Division, Brig. Gen. Christopher Horner, said such Russian work cannot be ruled out in light of previous U.S. allegations that Russia also has been pursuing an indiscriminate nuclear, space-based weapon. "I can't say I've been briefed on that type of system. But it's not implausible," he said... The French military's Space Command said in a statement to the AP that it could not comment on the findings but said, "We can inform you that Russia has, in recent years, been multiplying irresponsible, dangerous, and even hostile actions in space." The article also points out that this month Russia "said it has fielded a new ground-based missile system, the S-500, which is capable of hitting low-orbit targets..." Read more of this story at Slashdot.

  • NVIDIA Drops Pascal Support On Linux, Causing Chaos On Arch Linux
    by EditorDavid on 27/12/2025 at 8:34 pm

    NVIDIA has been "gradually dropping support for older videocards," notes Hackaday, "with the Pascal (GTX 10xx) GPUs most recently getting axed." "What's more surprising is the terrible way that this is being handled by certain Linux distributions, with Arch Linux currently a prime example.?" On these systems, updating the OS with a Pascal, Maxwell or similarly unsupported GPU will result in the new driver failing to load and thus the user getting kicked back to the CLI to try and sort things back out there. This issue is summarized by [Brodie Robertson] in a recent video. "Users with GTX 10xx series and older cards must switch to the legacy proprietary branch to maintain support," explains an announcement on the Arch Linux mailing list. But Hackaday points out that using the legacy option "breaks Steam as it relies on official NVIDIA dependencies, which requires an additional series of hacks to hopefully restore this functionality. "Fortunately the Arch Wiki provides a starting point on what to do." Read more of this story at Slashdot.

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