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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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  • NASA's First Nuclear-Powered Interplanetary Spacecraft Will Send Helicopters to Mars in 2028
    by EditorDavid on 28/03/2026 at 5:34 pm

    After decades of studying, this week NASA announced "a major step forward in bringing nuclear power and propulsion from the lab to space." NASA will launch the Space Reactor-1 Freedom, the first nuclear powered interplanetary spacecraft, to Mars before the end of 2028, demonstrating advanced nuclear electric propulsion in deep space. Nuclear electric propulsion provides an extraordinary capability for efficient mass transport in deep space and enables high power missions beyond Jupiter where solar arrays are not effective. Steven Sinacore, NASA's program executive for Fission Surface Power who will also oversee the SR-1 Freedom mission, emphasized to CNN that "On the ground the reactor is off. There's no radiation coming from it. It doesn't actually turn on until you're up in space, and that's where the radiation comes from." NASA says they aim to develop the capabilities required "for sustained exploration beyond the Moon and eventual journeys to Mars and the outer solar system." And Space Reactor-1 Freedom will carry a fleet of tiny helicopters (much like Ingenuity) to explore Mars, reports Space.com: Whereas Ingenuity was a technology demonstrator, however, the Skyfall fleet will have concrete tasks. Chief among them is scout: If all goes to plan, the little choppers will help NASA assess the potential of their target area (wherever that happens to be) to support human exploration. The Skyfall helicopters will carry cameras and ground-penetrating radar to scout a future landing site, to understand the slopes and hazards for human-scale landers," Steve Sinacore, the program executive for NASA's Space Reactors Office, said during the briefing. "They will also map and characterize the subsurface water ice to find out where the water ice deposits are, along with the size, depth and other important characteristics," he added... And that might not be the end of the line for SR-1 Freedom; NASA may decide to keep flying the spacecraft out into the solar system after it deploys the Skyfall choppers, according to Sinacore. The mission architecture, like much of NASA's exploration portfolio, is not yet finalized. Read more of this story at Slashdot.

  • 'Ads Are Popping Up On the Fridge and It Isn't Going Over Well'
    by EditorDavid on 28/03/2026 at 4:34 pm

    The Wall Street Journal reports: Walking into his kitchen, Tim Yoder recoiled at a message on his refrigerator door: "Shop Samsung water filters." Yoder, a supply-chain manager in Chicago, owns a Samsung Electronics Family Hub fridge. He paid $1,400 for an appliance that came with a 32-inch screen on the door that allows him to control other Samsung gadgets, pull up recipes or stream music. But since last fall, it's been intermittently serving up ads, part of a pilot program being tested on some of Samsung's smart fridges sold in the U.S. The response? Not warm. "I guess this is another place for somebody to shove an ad in your face," said the 47-year-old Yoder, recalling the first time he noticed one... The ads are only on certain Family Hub fridges that have screens and internet connectivity. They run as a rectangular banner at the bottom — part of a widget that also shows news, the weather and a calendar. Samsung declined to say how long the pilot might last or whether it would end. The firm recently unveiled a "Screens Everywhere" initiative that also includes washers, dryers and ovens.... Samsung launched the banner-type fridge ads that come as part of the widget via an October software update. In a footnote of a news release at the time, Samsung pledged to "serve contextual or non-personal ads" and respect data privacy. The banner ads can be turned off in settings. Samsung said the purpose of the pilot is to explore whether ads relevant to home chores can be useful to owners, and that overall pushback has been negligible. The "turn-off" rate for the pilot ad program remains in the bottom single-digit range, it said... While owners can turn off the banner ads, doing so eliminates the widget altogether, a bummer for Brian Bosworth, a media-industry engineer who liked the feature. Bosworth thinks it's wrong to take away the new feature as a condition. Wanting to keep the widget but not the ads, the 49-year-old in Edgewater, Md., made sure his home router's ad-blocking software extended to his fridge. He hasn't seen another since. One 27-year-old plans to return his refrigerator after the entire display "lit up with a full-screen ad for Apple TV's sci-fi show Pluribus," according to the article. The all-caps ad beckoned him "with an oft-used refrain directed at protagonist Carol Sturka: 'We're Sorry We Upset You, Carol.'" Thanks to Slashdot reader fjo3 for sharing the article. Read more of this story at Slashdot.

  • Transporting Antimatter On a Truck Is Tricky...
    by EditorDavid on 28/03/2026 at 3:34 pm

    Long-time Slashdot reader Qbertino writes: ... but the CERN Project "Antimatter in motion" just did it. For the first time in history researchers at CERN have transported 92 antiprotons on a truck in a specially designed magnetic enclosure. The test-drive went so well that the researchers spontaneously decided to go another round... The purpose of the experiment was to test the feasibility of transporting antimatter to other facilities in Europe to conduct further antimatter research. German news Tagesschau has a nice report. CNN reports that the antiproton enclosure was nearly six feet tall and weighed about 1,760 pounds. And Smithsonian magazine explains that it trapped the antiprotons in a vacuum chamber that had to be cooled to around -450 degrees Fahrenheit: Experts used a crane to carefully move the box of precious cargo from a lab onto a truck, which took about three hours, per the Associated Press' Jamey Keaten. Then, they drove the vehicle for roughly 30 minutes around CERN's campus, and subsequently returned the antiprotons to the lab. They worked with so little antimatter that even if it did touch ordinary matter and annihilate, it would release a small amount of energy detectable only by a special instrument, reports the AP. Read more of this story at Slashdot.

  • People are Using AI-Powered Services to Find Lost Pets
    by EditorDavid on 28/03/2026 at 2:34 pm

    A dog missing for two months was found at an animal shelter — and its owner received an email from an artificial intelligence service that identified it, according to the Washington Post. "As controversial as AI is right now, this is one of those areas where it's a real win," according to the chief executive at the nonprofit animal welfare organization Best Friends Animal Society. And while it shouldn't replace microchipping pets, AI does offer another tool to help desperate pet owners (and overcrowded animal shelters) — and might even be "game-changing"... People send photos of their lost pets to a database, and AI compares the pets' features — including facial structure, coat pattern and ear shape — to photos of stray pets that have been spotted elsewhere. Many of the stray pets have already been taken to shelters... Doorbell cameras have recently implemented facial recognition for dogs, and perhaps the largest AI database for pet reunification is Petco Love Lost, which says it has reunited more than 200,000 pets and owners since 2021... After owners upload photos of their lost pets, AI scans thousands of photos of lost animals from social media and from about 3,000 animal shelters and rescues that use the software, according to Petco Love, an animal welfare nonprofit that's affiliated with the pet store Petco. It notifies owners if two photos match. The article notes that one in three pets go missing during their lifetime, according to figures from the Animal Humane Society. "But as technology has progressed, so have resources for finding lost pets" — including GPS collars — and now, apparently, AI-powered pet identification. Read more of this story at Slashdot.

  • OpenAI's US Ad Pilot Exceeds $100 Million In Annualized Revenue In Six Weeks
    by BeauHD on 28/03/2026 at 11:00 am

    An anonymous reader quotes a report from Reuters: OpenAI's ChatGPT ads pilot in the United States has crossed the $100 million annualized revenue mark within six weeks of launch, a company spokesperson said on Thursday, pointing to robust early demand for the AI startup's nascent advertising business. [...] While roughly 85% of users are currently eligible to see ads, fewer than 20% are shown ads daily, with considerable room to grow ad monetization within the existing user pool, the spokesperson said. "We're seeing no impact on consumer trust metrics, low dismissal rates of ads, and ongoing improvements in the relevance of ads as we learn from feedback," OpenAI said. The company plans to expand the test globally in additional countries in the coming weeks, including in Australia, New Zealand, and Canada. OpenAI has now expanded to over 600 advertisers, with nearly 80% of small- and medium-sized businesses signaling interest in ChatGPT ads, the spokesperson said. The ChatGPT maker is set to launch self-serve advertiser capabilities in April to broaden access and drive further growth. CEO Sam Altman announced plans to begin testing ads on ChatGPT back in January after previously rejecting the idea. "I kind of think of ads as like a last resort for us as a business model," Altman said in 2024. Further reading: OpenAI CFO Says Annualized Revenue Crosses $20 Billion In 2025 Read more of this story at Slashdot.

  • UK Startup Ignites Plasma Inside Nuclear Fusion Rocket
    by BeauHD on 28/03/2026 at 7:00 am

    UK startup Pulsar Fusion says it has achieved the first plasma ignition inside a nuclear fusion rocket engine prototype -- a huge step for space travel that could cut missions to Mars "from months-long journeys to just a few weeks," reports Euronews. From the report: Pulsar Fusion revealed the milestone during a live stream at Amazon's MARS Conference, hosted by Jeff Bezos in California this week, with CEO Richard Dinan calling it an "exceptional moment" for the company. The team successfully created plasma - an intensely hot, electrically charged state of matter, often described as the fourth state of matter - using electric and magnetic fields inside its experimental and early prototype "Sunbird fusion exhaust system." [...] The company now plans further testing of its Sunbird system to improve performance. Upcoming upgrades include more powerful superconducting magnets designed to better contain and control plasma. Read more of this story at Slashdot.

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