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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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  • Texas Grid Flags Risks As Data Centers, Crypto Sites Fail Voltage Tests
    by EditorDavid on 08/06/2026 at 4:34 am

    Reuters reports: Several large data centers and crypto facilities planning to connect to the Texas power grid ahead of peak summer demand have failed key reliability tests, raising the risk of power outages just as electricity use hits its seasonal high, according to the state grid operator... Unlike traditional industrial customers, which tend to draw electricity steadily and predictably, data centers are engineered to cut their connection to the grid at the first sign of trouble to protect their equipment and keep services running. That makes them an unpredictable and potentially destabilizing force on grids already under pressure from rising demand. Four groups of unnamed large electricity users, including data centers, abruptly disconnected from the Texas grid during a test of how they would handle routine voltage disturbances, the Electric Reliability Council of Texas (ERCOT) said in a report dated May 21. When large customers abruptly cut their power use, it can knock the grid off balance and trigger wider outages. ERCOT, which manages electricity for most of Texas, said it reviewed about 20 gigawatts of large customers seeking to connect to the system, including eight projects totaling roughly 3.9 gigawatts aiming to start up before July 1. It said it identified four groups of large power users that could each trigger more than 5,000 megawatts of demand tripping under certain fault conditions, based on simulations of transmission system disturbances. Those abrupt drops in demand were equivalent to the electricity consumption of a large city such as Boston. Read more of this story at Slashdot.

  • Police Sued After Imprisoning Innocent Man Placed Near Violent Crime By Flock License Plate Reader
    by EditorDavid on 08/06/2026 at 1:34 am

    "When Hugo Parra was arrested last year on felony charges, his pleas of innocence fell on deaf ears," reports the Times of San Diego: San Diego police had a description of the Alfa Romeo car he was riding in [but no license plate number] and a witness who identified him during a curbside lineup as the man who brandished a handgun in Golden Hill. They had also checked the city's automatic license plate camera system, run by the private company Flock, and got a "hit," substantiating the claim. The problem, says attorney Alex Coolman, was that Parra was five miles away from Golden Hill at the time of the crime, and the so-called hit from the license plate reader was captured before any police pursuit began. "This Flock hit was obviously the wrong car, as it could not have been in both places simultaneously," said Coolman, who represents Parra and the driver, 23-year-old Ariel Beltran. Despite the signs pointing to it being a different Alfa Romeo, police arrested Beltran and Parra... [An officer had informed dispatch that one of the men "matched the victim's description, other than having a different-colored hooded sweatshirt."] Parra spent nearly one month behind bars, missing Thanksgiving and other special events with his family, before the assault with a firearm and evasion charges were dropped. Parras says he was incarcerated with actual murderers, according to the article, and Parra and Beltran are now preparing to sue the city, seeking $1.5 million each in damages for civil rights violations and negligence. Their claim notes they'd driven past several other Flock cameras which officers could've used to corroborate their story (not to mention location data on their cell phones). Meanwhile, the article also notes that last month the Institute for Justice "identified at least 17 cases in the United States of officers allegedly using Automated License Plate Reader technology to keep tabs on partners, exes, and strangers who had caught their eye..." Read more of this story at Slashdot.

  • Prada Unveils 'Liquid Cooling' Inner-Layer Garment for NASA's Moon Astronauts with Knitted-In Ventilation Tubes
    by EditorDavid on 07/06/2026 at 11:27 pm

    Italian fashion house Prada "unveiled on Sunday the inner-layer garment set to be worn by NASA astronauts heading to the moon," reports Reuters. "The body-hugging suit, created in collaboration with Houston-based space infrastructure developer Axiom Space, features ventilation tubes knitted into the garment." Expertise for developing space exploration products "can come from lots of seemingly unrelated industries," said Jonathan Cirtain, CEO of Axiom Space... The new product follows Prada's splashy foray into space fashion in 2024 with the unveiling of a spacesuit that is expected to be used for NASA's anticipated Artemis 4 moon landing in 2028... Other fashion and apparel companies have jumped on the space bandwagon. Under Armour has partnered with spaceflight company Virgin Galactic to create space apparel, while Columbia Sportswear has worked with space exploration company Intuitive Machines on space fabric technology. The new "Liquid Cooling and Ventilation Garment" was displayed on a mannequin at an event at Prada's Manhattan store. Read more of this story at Slashdot.

  • Black Market Tinkerers on Facebook Marketplace Offer to Hide 'Recording Lights' on Meta Smartglasses
    by EditorDavid on 07/06/2026 at 10:17 pm

    People are disabling the "recording light" on Meta's Ray-Ban smartglasses — "by my count, thousands of people," says tech journalist Joanna Stern in a new video report: STERN: "They're hiring people on Facebook Marketplace to drill out the light for as much as $100. According to our reporting, folks are offering this service in at least 30 states — despite Meta's attempts to stop it... In most states, we found multiple listings. In the New York and New Jersey area alone there were 23 listings." Stern watched a man in New Jersey disable and then conceal the light with a drill and dental probe in a New Jersey garage (a skill he learned watching YouTube and TikTok videos). He said the same day he'd already been contacted by eight more interested customers, and Stern also found at least 10 other people willing to do the same thing, just in New Jersey. "But what we found is they're all over the country." Meta sold 7 million smartglasses in 2025, but a Meta spokesperson insisted to the videomaker that a "majority" of their smartglasses owners aren't blocking the recording light. And furthermore, they added "We aggressively target anyone advertising tampering tools, have removed thousands of violating ads and Marketplace listings for these services, and pursue legal action when appropriate." (The reporter acknowledges "many" of the Marketplace ads disappeared after they brought them to Meta's attention — and Meta also said they were working with other retailers and sellers to take down listings for smartglasses-tampering parts.) The reporter also heard from one journalist who said they'd used it so they could record the activities of federal immigration agents without being targeted. "Others told me they just don't want people asking questions when they're recording." (There's video of one young man saying "It's already difficult enough to film in public. I don't want to have a blinking light on my face.") Tampering with smartglasses isn't illegal — though it is against Meta's Terms of Service, and could void your warranty. But a lawyer in the report says recording others without consent may be illegal, depending on a wide range of "jurisdictional nuances" like whether you live in an all-party consent state or a one-party consent state. "This seems to be our new reality," the report concludes: "more cameras, more microphones everywhere, and less certainty about who and what is recording." (Tech blogger John Gruber offered this assessment. "Using a Meta platform to find people to hack a Meta device so you can surreptitiously record strangers. So perfectly Meta.") Stern's report points out that "People are trying to fight back. Apps have popped up that use Bluetooth to scan for nearby camera glasses." (In the video one app-maker wonders why Meta isn't offering the same service themselves. "There are technical solutions to these problems.") Ironically, when I watched the report on YouTube, it was preceded by... an ad for Meta's Ray-Ban AI smartglasses. Read more of this story at Slashdot.

  • New Fortune 500 Rankings: Texas Overtakes California, But Amazon is #1, Beating Walmart
    by EditorDavid on 07/06/2026 at 8:29 pm

    "Texas has dethroned California as the state with the most Fortune 500 companies," reports the Los Angeles Times: The Fortune 500 list ranks the largest U.S. companies by revenue. This year, 57 of the top companies are headquartered in Texas, compared with California's 56. It's a reversal from two years ago when the Golden State had the pole position... California's corporate haters say they try to avoid the state's high costs, income taxes and strict regulations, but the western state is still a top money maker. "California dominates on nearly every other measure: its Fortune 500 companies are the most profitable ($647 billion), most valuable ($20 trillion), and employ more people than any other state (2.8 million workers)," Fortune said in a news release. Indeed, despite the naysayers, Californian companies have been leading the world in developing artificial intelligence technology as well as the latest in space and defense tech. The state is home to nearly 400 "unicorns," or billion-dollar startups — more than any other state, according to CB Insights. It also gobbled up nearly two-thirds of U.S. venture capital last year, with San Francisco Bay Area startups such as OpenAI leading the way, according to the business information platform Crunchbase. Texas and California have been in a tug-of-war for the crown. In 2024, after a decade, California bagged the top spot with 57 companies on the list, while Texas and New York tied in second with 52 companies each... The fourth spot was tied between Illinois and Ohio, with 29 companies each. Amazon was the top company on the list, ending Walmart's 13-year reign at the top of the annual Fortune 500 companies list. Amazon's 2025 revenue was $716.9 billion, compared with Walmart's $713.2 billion. Seattle-headquartered Amazon joined Exxon Mobil, General Motors, and Walmart as the only four companies to have ever held the top position since Fortune began publishing the data in 1955. Read more of this story at Slashdot.

  • The Gamer-Rights Group Fighting to Make the Industry Stop Killing Games (Servers)
    by EditorDavid on 07/06/2026 at 7:10 pm

    "Can a company take away something you've already paid for?" asks the BBC. "In the world of online video games, some already do." Publishers can decide to switch off a game's servers, often leaving it effectively unplayable. Stop Killing Games, a growing consumer rights campaign started by American YouTuber Ross Scott in 2024, is challenging that practice. In January, the group submitted a petition featuring nearly 1.3 million signatures to the European Commission, triggering a public hearing in the European Parliament in April. What began as an online campaign is now awaiting a decision from one of the EU's most powerful institutions... Scott's campaign began following an announcement from the major studio Ubisoft, saying it would shut down the online-only racing game The Crew in 2024... Ubisoft has already defended its position in court. Responding to a proposed class-action lawsuit brought by two The Crew players in California, the studio argued that customers had purchased a licence to use the game, not unlimited ownership rights, and that players had been warned online services would not be available forever. The lawsuit was dismissed without prejudice in June 2025, after the plaintiffs voluntarily withdrew the case. The wider games industry has also pushed back against the campaign. Video Games Europe, which represents many of the industry's largest publishers, said shutting down online services "must be an option" when games are no longer commercially viable. It also warned that some of the campaign's proposals could make online-only games significantly more expensive to develop. "In no way are we asking companies to keep servers running or services going, they can end it any time they want," said Scott. Instead, he and his fellow campaigners argue that when a game is shut down it should be done "responsibly", with publishers considering "end-of-life plans" such as updating the game to work offline or releasing software that allows players to continue running it. Two key points from the article: "In March, French consumer group UFC-Que Choisir launched legal action against Ubisoft over the shutdown of The Crew, arguing that players were misled about the permanence of their purchase and that some of the company's contract terms were unfair." "The European Commission must respond to the European Citizens' Initiative — the petition brought by the group — by 27 July." Thanks to Alain Williams — Slashdot reader #2,972 — for sharing the article. Read more of this story at Slashdot.

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