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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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  • Superconducting Thruster Harnesses Earth's Magnetic Field In First Orbital Test
    by BeauHD on 08/07/2026 at 11:00 am

    New Zealand startup Zenno Astronautics has completed the first orbital test of its "Supertorquer," a shoebox-sized superconducting magnet system that uses solar power and Earth's magnetic field to help control a satellite without fuel. The company says the technology could eventually support fuel-free satellite maneuvers, docking, deep-space trajectory changes, and even magnetic radiation shielding for astronauts. Space Magazine reports: The tests began shortly after Mira's launch in November last year aboard the SpaceX Transporter 12 mission and saw the shoebox-size device perform with flying colors, Zenno Astronautics CEO and founder Max Arshavsky, told Space.com. "It's a technology that allows a spacecraft to not tumble violently in space and point in the right direction," Arshavsky said. "The unit has multiple super-conducting magnets that are positioned in different axes. When we power up the magnets, they generate a magnetic field, which interacts with Earth's magnetic field, and because we can control the magnetic field on the satellite, we can control the way in which it turns with respect to Earth." Superconducting magnets are made of coils of superconducting wire that have zero electrical resistance and can therefore conduct much larger currents than normal wires. That larger current translates into a greater magnetic force. There is, however, a catch: Superconducting materials need to be cooled to extremely low temperatures to gain their wonder properties. [...] The unit housing the superconducting magnets is wrapped in layers of insulation and fitted with a heat pump that removes all the excess heat from the system. Every time the satellite needs a push, the superconducting coils power up, drawing energy from a battery charged by the satellite's solar panels. "It's converting solar energy straight into useful work," Arshavsky said. "Energy is the one thing that is abundant in space, and you can use it to energize the magnet to create a magnetic acceleration device. It gives you acceleration without fuel." In the future, Zenno Astronautics plans to launch larger systems that could enable spacecraft to dock in space or conduct close proximity operations using just the power of their solar-powered superconducting magnets. Arshavsky envisions powerful magnets that could, in the future, propel spacecraft on missions to the moon and Mars using only solar power. Read more of this story at Slashdot.

  • Japan Releases Snowman-Like Asteroid Image After Flyby
    by BeauHD on 08/07/2026 at 7:00 am

    Japan's Hayabusa2 probe captured rare close-up images of near-Earth asteroid Torifune, revealing a snowman-like shape made of two joined lobes. Phys.org reports: The fridge-sized Hayabusa2 skimmed asteroid Torifune on Sunday in a mission that demonstrated the ability to deflect a potentially dangerous space rock away from Earth. A new image released by the Japan Aerospace Exploration Agency (JAXA) on Monday could aid such efforts, as researchers say near-Earth asteroids vary in their size, shape and surface characteristics. "The moment I actually saw this image and the scientific data -- it really gave me goosebumps," JAXA scientist Yuya Mimasu told reporters, adding the asteroid "personally looked like a snowman." The black-and-white image, captured by a telescopic camera, showed what appeared to be two round objects joined together. "You can actually see the rocks... I really hadn't expected to be able to take a photo like this, so I'm absolutely over the moon," he said. [...] Moving at a speed of more than 18,000 kilometers (11,185 miles) per hour, the probe was due to fly within 800 meters (2,625 feet) of the asteroid, but JAXA said it would analyze the distance later. If confirmed, the mission would be one of the closest flybys of a near-Earth asteroid ever. JAXA also said Monday it succeeded in acquiring data from three other devices that can measure the distance from the asteroid and examine the existence of water. Read more of this story at Slashdot.

  • Meta Now Lets Anyone Use Your Instagram Photos In AI Images
    by BeauHD on 08/07/2026 at 3:30 am

    An anonymous reader quotes a report from Wired: Meta launched its inaugural AI image model from the Meta Superintelligence Labs on Tuesday, its effort to compete with the likes of OpenAI's GPT Images 2.0 and Google's Nano Banana 2 in the AI image generation race. The new model, called Muse Image, rolled out with deep integrations woven into the Instagram app. As part of this update, public Instagram profiles are now automatically opted into being fodder for generative AI remixes. All someone has to do is tag your account's profile in a prompt -- if it's public -- and they can use Meta AI to generate an image using your likeness. Meta positions this feature as a cheeky way to personalize generations with images of real people. "Whether you want to design a custom event invitation, mock up a collaborative creative concept, or generate a personalized graphic, tagging a username lets Meta AI use public photos to build a visual that's ready to post," reads one of Meta's announcement blogs about the new AI tool. [...] Instagram's help center site includes more details about how this feature will impact users, saying that "people may be able to create content with your Instagram content using AI features at Meta" if you leave your account public and on the default settings. (A previously archived version of this page from 2025 does not include similar, AI-focused language.) Instagram users who want to stop others from using their public posts for AI images (without switching your account to private) must manually disable the options under the app's "Sharing and reuse" settings. However, turning off the setting only blocks future AI generations; any AI images already created from their content will remain. Meta also says users will not be notified when others create AI-generated content using their posts. Read more of this story at Slashdot.

  • Doom Developer id Software Is Reportedly Losing Half Its Staff
    by BeauHD on 07/07/2026 at 11:00 pm

    Doom developer id Software is reportedly laying off about half its staff as part of Microsoft's broader Xbox cuts. The reported layoffs potentially affects around 90 employees. Engadget reports: While neither Microsoft nor id Software have formally acknowledged the layoffs, one former member of the studio's staff, Michael Maynard, has echoed the 50 percent figure on LinkedIn. According to at least one of Game Developer's sources, that could translate to around 90 job cuts, though it's so far unclear what departments at id Software have been hit hardest. [...] Bloomberg reported yesterday that as part of the "reset" at Xbox, ZeniMax Media, the parent company of id Software, will be focusing on its biggest franchises -- like The Elder Scrolls, Fallout, Wolfenstein and Doom -- going forward. It's possible that motivated the cuts to id Software, but the developer at least outwardly appears to be already heavily focused on Doom. The studio launched Doom: The Dark Ages in 2025 and an expansion to the game on July 7, 2026. Whatever the reason, the cuts at Xbox aren't over: While Microsoft eliminated 1,600 roles alongside the announcement that Xbox is restructuring, it still plans to lay off another 1,600 employees over the coming months. Read more of this story at Slashdot.

  • Microsoft Flips Windows Backup On By Default Outside the EU
    by BeauHD on 07/07/2026 at 10:00 pm

    Microsoft will turn on Windows settings backup and restore by default for eligible Windows 11 business devices outside the EU, starting with Windows 11 26H2. The Register reports: Now dubbed "Windows settings backup and restore," the service backs up a device's settings and a list of installed Microsoft Store apps, which can then be restored to a new device. Microsoft gave a use case for the technology: "Imagine a lost laptop, a hardware refresh, or an unexpected reset. These are some of the moments when your users need backup most. And that's rarely when anyone wants to discover that backup was never turned on." However, some organizations might not want it on. Perhaps those with strict privacy or data sovereignty requirements, or those regulated by the EU Digital Markets Act (DMA), for whom the default-on behavior won't apply. Windows 11 25H2 and earlier are also excluded, as is any device with a backup policy that explicitly disables the setting. Everything else running Windows 11 26H1 will get switched on after a feature update, and the same applies to 26H2, currently with Windows Insiders in the Experimental channel. Administrators might reasonably be wary of this being opt-out rather than opt-in. Backups are useful, but Microsoft is clear that this is not a comprehensive backup solution, calling it only "one step in a broader Windows resiliency effort." The implications still need consideration. An opt-out setting that quietly ships settings data off-device is exactly the sort of thing that adds to administrators' workloads rather than lightening them. Read more of this story at Slashdot.

  • Samsung Passes Nvidia To Become Most Profitable Company In the World
    by BeauHD on 07/07/2026 at 9:00 pm

    Samsung's chip division is projected to earn more in 2026 than it made across its previous 40 years in semiconductors, driven by soaring AI-fueled demand for memory and storage. The company's latest quarterly operating profit reportedly topped Nvidia's, making Samsung the world's most profitable tech company for the period. Tom's Hardware reports: Brokerage consensus puts Samsung's full-year 2026 operating profit near 300 trillion won ($196 billion), and its second-quarter figure at about 84.6 trillion won ($55.1 billion). Samsung easily beat the consensus with $58.5 billion when it posted preliminary results on July 7, overtaking Nvidia's most recent quarterly operating profit of $53.54 billion and becoming the most profitable technology company in the world for the period, on the back of AI-driven memory demand. Samsung's DS division booked 53.7 trillion won ($35.1 billion) of the company's 57.2 trillion won in total operating profit during the first quarter of 2026, roughly 94% of the total, which is why the division's projection sits so close to Samsung's full-year consensus. "This year's profit will exceed the cumulative profit generated over the past 40 years since we entered the semiconductor business," Kim Yong-Kwan told staff, scoping the claim to the chip business rather than the wider conglomerate. Further reading: Samsung Chip Workers To Get $340,000 Average Bonus In AI Boom Read more of this story at Slashdot.

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