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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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  • Electrically Charged Raindrops Can Corrode Cars and Buildings
    by BeauHD on 01/09/2026 at 7:00 am

    Researchers have found that tiny electrical charges picked up by moving water droplets may be damaging cars and buildings like the Eiffel Tower. In experiments, thousands of charged droplets degraded Teflon and corroded the copper beneath it, while uncharged droplets caused no comparable damage. C&EN reports: For years, researchers at the Max Planck Institute for Polymer Research have studied how water droplets from rain, dew, ocean waves, and melting snow become electrically charged. They say the process is like tribocharging, which causes static when we rub certain objects together, such as a balloon on our hair or a sweater on our skin. "Water drops spontaneously become electrically charged when moving on different surfaces, such as plant leaves, insect wings, building walls, window glass, and plastic. This process, known as contact or sliding electrification, is analogous to tribocharging between solids," says study coauthor Zhongyuan Ni, a PhD candidate at Max Planck. "Water drops getting charged is not a new phenomenon, but for the past 200 years, people have not paid attention to this," Ni says. In 2023, Ni and colleagues set out to determine whether electrically charged water droplets affect the surfaces they contact. To find out, the team poured water over four common surfaces -- a plant leaf; polyvinyl chloride foam board; polystyrene glass; and perfluoro octadecyltrichlorosilane (PFOTS), a commonly used water-repelling coating -- and let it drip onto sheets of Teflon-coated copper tilted at 50 degrees. When the experiments began, the team would allow only a few dozen drops to fall onto the copper before using electron microscopy to examine it. The researchers repeatedly failed to find any evidence of decay. But one day, Ni just let the drops keep falling. "After thousands of drops, it looked like the drops were pinning onto the surface," he says. After inspecting the copper under the microscope, Ni got his first glimpse of the destructive strength of electrically charged water drops. After repeating the experiment several times with thousands rather than dozens of drops, the researchers found that the electrified water drops not only broke down the Teflon coating but also corroded the underlying copper. Up close, the copper sheets looked like scraped-up skin. But when the experiment was conducted with nonelectrified drops, neither the copper nor its Teflon coating was any worse for wear. Even though the drops contained only around 0.2 to 2.0 nanocoulombs of charge -- around one billionth of a standard unit -- the impact of the charged drops was significant. "The finding is important because it suggests that the electrical state of a water droplet, not just its chemical composition, acidity, or mechanical impact, can influence how corrosion begins," says Guangwen Zhou, a professor of mechanical engineering at Binghamton University who was not involved in the study. "This perspective could open up new approaches to designing protective coatings and materials that are more resistant to corrosion in environments where charged water droplets are present." Read more of this story at Slashdot.

  • Trump Tells FCC To Punish Journalist For Calling His Election Results 'Mixed'
    by BeauHD on 01/09/2026 at 3:30 am

    An anonymous reader quotes a report from Ars Technica: President Trump yesterday demanded that the Federal Communications Commission punish or rebuke an NBC journalist for saying he has "mixed results" in his election endorsements. In the latest example of how Trump is using the FCC to harass reporters and news organizations that he dislikes, he said Meet the Press host Kristen Welker "will be reported to the FCC for rebuke or punishment" for what he claimed was a "purposeful inaccuracy." "Kristen Welker, the Unpopular 'Hostess' of the once great Meet the Press, now considered Meet the Fake Press, just stated that Donald Trump has 'mixed results' on his Endorsements of Candidates, when the recent WINS of Darline Graham and Mike Mazzei, stand at 100% for the U.S. Senate, and 98% for the U.S. House, recently and over the longterm. How can anyone be allowed to say this, working for freely given Public Airwaves? Results are attached. Because of this purposeful inaccuracy, she will be reported to the FCC for rebuke or punishment," Trump wrote in a Truth Social post. A separate post from Trump yesterday said, "THE FAKE POLLS USED BY OUR CROOKED MEDIA ARE OUT OF CONTROL, AND SOMETHING MUST BE DONE ABOUT IT. FCC TO THE RESCUE! President DJT." Trump also posted a rant on Friday about New York Times journalist Maggie Haberman, calling her "an unattractive person both inside and out" who "should be forced to turn over any and all money that she's made through her fake reporting on me." Trump referred to Haberman throughout his post as "Maggot Haberman." Trump's post about Welker included an image purporting to show he has near-perfect results in his endorsements this year. "The Press is a Disgrace to our Nation, and I hope that Chairman Brendan Carr, and the fine people of his Commission, will take this Threat to our Country very seriously," Trump wrote. Perhaps indicating that he will refer additional journalists for FCC punishment, Trump wrote that Welker "is not the only one. The Radical Left News is going out of their way to harass, demean, and libel anything 'TRUMP.'" The FCC website says the commission "cannot prevent the broadcast of any particular point of view," and that it "generally will not intervene" in complaints about "one-sided news reports" because "it would be inconsistent with the First Amendment to replace the journalistic judgment of licensees with our own." As noted by Ars, FCC Chairman Brendan Carr has "made it clear he takes orders from Trump, abandoning his previous position -- which he held under Democratic presidents -- that the FCC must operate independently of White House interference." Carr could use the commission's regulatory authority over licensed broadcasters to open an investigation into Welker, potentially creating pressure on NBC and its affiliated stations through licensing proceedings or other FCC actions. The most likely vehicle would be the FCC's rarely enforced news distortion policy, which Carr has repeatedly revived to target coverage he considers misleading; historically, however, the policy required an unusually high evidentiary bar and was seldom enforced. Read more of this story at Slashdot.

  • FTC Sues Amazon, Accusing the E-Commerce Giant of Misleading Advertisers
    by BeauHD on 31/08/2026 at 11:00 pm

    The FTC and 22 state attorneys general are suing Amazon, accusing the company of secretly inflating advertising prices through undisclosed changes to its auction system that may have extracted more than $20 billion from advertisers since 2019. "Amazon has millions of advertising customers who were misled into paying significantly higher prices," FTC Chairman Andrew Ferguson said in a statement. "These higher costs were largely passed on to American consumers." CNBC reports: The complaint, which was filed in U.S. District Court for the Western District of Washington, centers on Amazon's sponsored products ads, brands ads and display ads that run alongside search results on its sprawling webstore. Amazon has amassed the third-largest digital advertising business globally, trailing only Google and Meta. The company hauled in more than $68 billion in ads revenue last year, with the lion's share coming from sales of sponsored products ads. Third-party sellers who hawk their wares on Amazon's marketplace have recently criticized surging advertising costs on the site, including a string of recent policy changes, which led to some top merchants withholding their ad spend in a boycott. The company has traditionally used a "second-price" auction system, wherein it told advertisers they "only pay the least bid amount needed in order to win," the complaint states, citing Amazon's own marketing materials. The FTC alleges in its complaint that Amazon in 2019 changed its auction rules without notice by adding an undisclosed surcharge it referred to as a "soft reserve price," which led to higher ad prices. "Amazon made this surreptitious change to its auction because it was unhappy about how much revenue its advertising auctions were generating," the agency said in its complaint, which cites internal communications between Amazon ad executives. In one exchange, a company executive allegedly acknowledged it uses an "invented auction participant" to increase prices, the FTC said. The FTC and the states alleged Amazon's practices violate federal and state consumer protection laws, and they're seeking civil penalties, restitution and other unspecified damages. In a blog post, Amazon called the FTC's lawsuit "misguided" and said the complaint "fundamentally misunderstands how advertisers operate." The company added that the agency's lawsuit doesn't include evidence of consumer price increases. "We've provided advertisers with guidance about our auctions and pricing in the main tools they use to manage their campaigns, and we continue to update that guidance," the company said. "We look forward to making our case in court." Read more of this story at Slashdot.

  • Apple Caught Off Guard by AI Demand for Mac Mini and Mac Studio
    by BeauHD on 31/08/2026 at 10:00 pm

    According to The Information (paywalled), Apple reportedly moved up the release of new Mac mini and Mac Studio models after unexpectedly strong enterprise demand for Macs capable of running AI workloads. MacRumors reports: Apple normally releases new Mac models in the autumn, closer to October or November, making this week's announcement unusually early, falling just before the anticipated arrival of new iPhone models. The Information says that the AI-driven boom in Mac Studio and Mac mini sales is behind the early launch. Apple noticeably promoted the ability to link multiple Mac Studios together into a single, more capable system for running large frontier AI models, a feature aimed at business and developer customers rather than everyday consumers. Apple highlighted the Mac mini and Mac Studio's shift toward business buyers in June, with a "Business at the Park" event involving executives from major companies Ford, Disney, and Anthropic. The Mac mini was said to be the "darling" of the event. Even so, enterprise's rush toward powerful desktop Macs more broadly took Apple by surprise. The company reportedly did not possess an engineering team dedicated to business customers or staff focused on developer relations, and lacked an enterprise AI strategy. Businesses that approached Apple asking to buy access to the company's Private Cloud Compute infrastructure were reportedly turned down. Apple is instead leaning on partners such as WebAI and Mount Thor, which provide AI tools and execution environments built on Apple hardware. Read more of this story at Slashdot.

  • Broadcom Pledges to Lock Down Open Source Python, Java Libraries
    by BeauHD on 31/08/2026 at 9:00 pm

    Broadcom is launching "TrueSource," an effort to curate and secure open-source components used with its Tanzu platform, including Spring, RabbitMQ, and libraries across Java, Python, and Node.js. "The idea is to provide a set of solutions focused on providing clean and secure artefacts," Purnima Padmanabhan, vice president of Broadcom's Tanzu Division, told The Register. "We choose and build every Spring library, databases, other Java components," she said. The Register reports: Padmanabhan said that promise means VMware will also provide "TrueSource trusted artifacts" for code that is not part of Spring, including the wider Java ecosystem, Python, and Node.js. "Broadcom's curation process ensures that the libraries conform to a reference architecture and are supportable by the maintainers of record," according to a company statement. "Thousands of engineers across Broadcom's software divisions scan, fix, contribute to, and consume them every day." A VMware spokesperson told The Register the Broadcom business unit "will work with and support maintainers on open source software and we will provide fixes to open source upstream for any active projects." "With Spring and RabbitMQ, we are the maintainers. For other open source software, we will work with the maintainers. We believe that the community maintainers must remain the source of truth," the spokesperson said. This is just the sort of contribution that the open-source community wants vendors to do to reflect the value they extract from software they did not create alone. It's also the sort of thing vendors sometimes conclude they need to do to keep products based on FOSS viable. Read more of this story at Slashdot.

  • Kalshi Dishes Out Its First-Ever Lifetime Ban to George Santos
    by BeauHD on 31/08/2026 at 8:00 pm

    Kalshi has issued its first-ever lifetime ban to former U.S. Rep. George Santos after concluding he failed to fully cooperate with an insider-trading investigation. He is also being fined $71,356, according to a filing (PDF) on its website. Engadget reports: It was reported in June that Santos was under investigation from the Department of Justice (DOJ) and the Commodity Futures Trading Commission (CFTC) over insider trading. Prediction markets like Kalshi allow users to buy contracts or shares in the outcome of events. Participants don't necessarily have to wait for an event to resolve before selling these contracts and cashing in. Santos allegedly bought contracts on Kalshi indicating that he would not attend this year's State of the Union speech after weather disrupted his travel plans. According to the CFTC, Santos then sold those contracts for a profit after claiming on social media that he would be in attendance. The former congressman is said to have made more than $17,500 through this scheme, which Kalshi reportedly detected and flagged to authorities. In July, Santos agreed to pay over $35,000 to settle the CFTC's claims against him. The agency also issued him a three-year trading ban. Kalshi, however, doesn't plan to allow Santos back on its platform in 2029 (or anytime after that). The company confirmed to The Wall Street Journal this was the first time it had given anyone a lifetime ban and that it did so because Santos didn't fully cooperate with its investigation. He can appeal the decision to the CTFC. Read more of this story at Slashdot.

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