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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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  • Astronomers May Have Discovered First Moon Outside Our Solar System
    by BeauHD on 24/07/2026 at 3:00 pm

    Astronomers studying the star system CD-35 2722 may have found the first known moon-like object outside our solar system. The classification is unusually tricky, however, because it orbits a brown dwarf rather than a planet, making it clearly an "exosatellite" but forcing scientists to rethink where the line between planet, moon, and failed star should be drawn. Space.com reports: The star CD-35 2722 is located around 73 light-years away and has around half the mass of the sun. It is orbited by a "failed star" or brown dwarf. These stellar bodies get their unfortunate nickname because they form like other stars but fail to gather enough mass to trigger the fusion of hydrogen to helium in their cores. In terms of mass, brown dwarfs are more massive than the largest gas giant planets, but smaller than the smallest stars, usually with around 13 to 80 times the mass of Jupiter, or around 0.013 to 0.08 times the mass of the sun. The newly discovered object in CD-35 2722 is certainly moon-like, but rather than orbiting a planet as the moons in the solar system do, it orbits the system's brown dwarf. "This system is somewhat hard to define using solar-system-based words like 'planet' and 'moon.' The exosatellite is clearly massive enough to be a planet, but it does not orbit a star, though it orbits an object that orbits a star," team leader Kevin Hoy of the Universidad Diego Portales and the Millennium Nucleus of Young Exoplanets and their Moons (YEMS) in Chile, said in a statement. "Being the third wheel in this system makes us want to call it a moon, even if it is nothing like the small, rocky moons we have in our system." The team currently isn't able to definitively claim this object in CD-35 2722 is an exomoon, because that would require really nailing down a new definition of what a moon is. "The satellite we report is a giant gaseous body orbiting a highly massive companion, itself several times the mass of Jupiter. We have a clear delineation between the planets and the sun in the solar system, so defining things like moons is simple," team member Alice Zurlo of the Universidad Diego Portales said. "In the CD-35 2722 system, where we are blurring the lines between stars, planets, and moons, the whole thing becomes more complicated to describe." Zurlo and colleagues can, however, confidently claim this is an exosatellite, meaning it is a first-of-its-kind detection no matter what the future holds for its classification. The findings have been published in the journal Nature. Read more of this story at Slashdot.

  • Humans Can Learn To Echolocate In Just 10 Weeks, and It Rewires the Brain
    by BeauHD on 24/07/2026 at 11:00 am

    alternative_right shares a report from ScienceAlert: A study published in PLOS One in 2021 by researchers from Durham University in the UK showed that with 10 weeks of training, both blind and sighted people could learn to echolocate using verbal clicks. While the technique is already used by a number of people with impaired vision -- sometimes using the taps of a cane instead of clicks made by their mouth -- those findings suggest that many of us can learn the necessary techniques. Some of the same researchers who made that discovery are part of the team behind a follow-up study published in Cerebral Cortex, looking at how the 10 weeks of training that the 26 participants went through actually changed the physical structure of their brains. Specifically, the team analyzed brain scans of the V1 (the primary visual cortex, processing visuals), and the A1 (the primary auditory cortex, processing sounds). Strikingly, the scans showed that the V1s of both blind and sighted people had developed sensitivity to sound echoes during echolocation training. Read more of this story at Slashdot.

  • World's First Wave Power Generator Receives Certification For Regular Use
    by BeauHD on 24/07/2026 at 7:00 am

    "The Norwegian certification agency DNV has certified the commercial wave-driven power generator Corpower C4 for regular use," writes Longtime Slashdot reader Qbertino. "German news site heise.de has a detailed write-up. See a CGI video of the power station and its internals, as well as the company's website [at their respective links]." From the report (translated to English): According to the manufacturer Corpower Ocean, it is the first DNV prototype certificate for a wave energy converter. The certificate confirms that Corpower's technology meets DNV's requirements for structural strength, reliability, and safety, Corpower Ocean announced. The certification process began in the design phase and lasted seven years. DNV oversaw the process from concept development through design, manufacturing, and assembly, to dry-running tests and subsequent operation. This is an important step, said Patrik Moller, CEO and one of the founders of Corpower Ocean. With the certification, wave energy is no longer just a promising technology, but a proven and financially viable one. This opens up new opportunities for project financing, insurance, and investments in commercial applications. The Corpower C4 wave power plant looks like a normal buoy: It consists of a 19-meter-long floating body with a diameter of 9 meters and a weight of approximately 11 tons. The system is anchored to the seabed. A mechanism inside the buoy converts its up-and-down movements in the waves into a rotary motion. This, in turn, drives a generator that produces electricity. The report notes that the company is "planning the first two industrial-scale wave energy farms off the coasts of Portugal and Scotland," which are scheduled to begin operating sometime between 2027 and 2029. Read more of this story at Slashdot.

  • Google Adds Selfie Video As a Log-In Option
    by BeauHD on 24/07/2026 at 3:30 am

    An anonymous reader quotes a report from Engadget: You'll now be able to use selfie videos to log into your Google account. It has long been possible to log into Google using your face, via your phone's face unlock or if your passkey login uses biometrics for verification. This is yet another option to get into your account using your face to authenticate your identity, which could be especially useful if you don't have access to the phone or computer you typically use or if you got locked out of your account and none of the other log-in options are working. [...] Google will ask you to turn your head in certain ways during the verification and every time you use the option to log in. The company says it's to fend off impersonation attempts, such as deepfake videos, and prove you're currently in front of the camera. It will, of course, have to save your selfie video and use it for comparison for future logins.The company says it will encrypt your video and only use to help you sign in, but if you ever change your mind, you can delete it from your Google account. It's worth noting the option is currently unavailable for Workspace accounts, child accounts and those enrolled in Google's Advanced Protection Program. You can set it up and give it a try at g.co/signin-selfie. Read more of this story at Slashdot.

  • Oracle Signs 10-Year Software Contract With Pentagon Worth Up To $7 Billion
    by BeauHD on 23/07/2026 at 11:00 pm

    Oracle has signed a 10-year Pentagon contract worth up to $7 billion to provide on-premises software, licenses, maintenance, and consulting for branches of the military. CNBC reports: The contract covers the use of Oracle software in on-premises data centers for branches of the military, the U.S. intelligence community and the Coast Guard, according to a statement. The Central Intelligence Agency was Oracle's first customer. A five-year base period for the contract includes perpetual and subscription-based software licenses, maintenance and consulting, according to one description. Kirsten Davies, the Department of Defense's chief information officer, said in the release that the agency is saving at least $441 million for taxpayers "by fundamentally improving how we procure on-premises Oracle capabilities." Read more of this story at Slashdot.

  • Microsoft Responds to LG Monitors Installing McAfee Ads On Windows
    by BeauHD on 23/07/2026 at 10:00 pm

    LG is removing a McAfee pop-up ad from its LG Monitor App Installer after criticism that some LG monitors were silently installing the app through Windows Update and showing ads on every boot. Microsoft says LG agreed to disable the McAfee pop-up, but the broader issue remains: Windows allows certain peripheral companion apps to install automatically without notifying users. Ars Technica reports: Following Gamers Nexus' video, a Microsoft representative stated that the LG Monitor App Installer will no longer show pop-up ads for McAfee. In response to a social media post about the app, Pavan Davuluri, EVP of Windows and devices at Microsoft, said this week: "We've connected with the team at LG and as an immediate next step, they have agreed to disable the McAfee pop-up from their app. We appreciate LG working with us toward a shared goal of a better experience for our mutual customers. We will keep improving here with our ecosystem partners." As mentioned, some LG monitors appear to have been installing LG Monitor App Installer onto Windows computers for months. Publication Windows Latest noted that the app recently got an update, "and its changelog mentions McAfee as an additional app," which could be what prompted more people to see the ads... and then complain about them. However, the removal of McAfee doesn't address the problem of a peripheral installing ad-pushing software onto people's computers. Users have been finding LG Monitor App Installer and its ads on their systems without LG ever showing a prompt or asking for permission. LG has some of the most expensive computer monitors available. Paying, in some cases, over $1,000 for a monitor that ends up forcing ads onto Windows is disruptive and a privacy concern. Once the app is installed, "LG technically possesses permission to use 'all system resources,'" as well as to "collect geolocation, device data, online activity, contacts, user credentials, transactions, and more," [editor-in-chief of Gamers Nexus, Steve Burke] said. Read more of this story at Slashdot.

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