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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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  • Duolingo Grows, But Users Disliked Increased Ads and Subscription Pushes. Stock Plummets Again
    by EditorDavid on 28/02/2026 at 11:25 pm

    Friday was "a horrible day" for investors in Duolingo, reports Fast Company. But Friday's one-day 14% drop is just part of a longer story. Since last May, Duolingo's stock has dropped 81%. Yes, the company faced a social media backlash that month after its CEO promised they'd become an "AI-first" company (favoring AI over human contractors). And yes, Duolingo did double its language offerings using generative AI. But more importantly, that summer OpenAI showed how easy it was to just roll your own language-learning tool from a short prompt in a GPT-5 demo, while Google built an AI-powered language-learning tool into its Translate app. And yet, Friday Duolingo's shares dropped another 14%, after announcing good fourth quarter results but an unpopular direction for its future. Fast Company reports: On the surface, many of the company's most critical metrics saw decent gains for the quarter, including: — Daily Active Users: 52.7 million (up 30% year-over-year) — Paid Subscribers: 12.2 million (up 28% year-over-year) — Revenue: $282.9 million (up 35% year-over-year) — Total bookings: $336.8 million (up 24% year-over-year) The company also reported its full-year 2025 financials, revealing that for the first time in its history, it crossed the $1 billion revenue mark for a fiscal year. But the Motley Fool explains that Duolingo's higher ad loads and repeated pushes for subscription plans "generated revenues in the short term, but made the Duolingo platform less engaging. Ergo, user growth decelerated while revenues rose." Thursday Duolingo announced a big change to address that, including moving more features into lower-priced tiers. Barron's reports: D.A. Davidson analyst Wyatt Swanson, who rates Duolingo stock at Neutral, posited that the push to monetize "led to disgruntled users and a meaningful negative impact to 'word-of-mouth' marketing." Duolingo has guided for bookings growth between 10% and 12% in 2026, compared with the 20% rate the company would have expected to see "if we operated like we have in past years...." If stock reaction is any indication, investors are concerned about Duolingo's new focus. Read more of this story at Slashdot.

  • New 'Star Wars' Movies Are Coming to Theatres. But Will Audiences?
    by EditorDavid on 28/02/2026 at 9:34 pm

    "The drought of upcoming Star Wars movies is coming to an end soon," writes Cinemablend. In May the The Mandalorian and Grogu opens, and one year later there's the release of the Ryan Gosling-led Star Wars: Starfighter. But "there are some insiders who already believe that Starfighter will be a bigger hit than The Mandalorian and Grogu..." According to unnamed sources who spoke with Variety, there's a "sense" that Star Wars: Starfighter, which is directed by Deadpool & Wolverine's Shawn Levy, will be a more satisfying viewing experience. These same sources are allegedly impressed by the early footage they've seen of Ryan Gosling's performance and also suggested that Levy has "recaptured the franchise's spirit of fun." Furthermore, the article states that there's concern that because The Mandalorian and Grogu is spinning out of a streaming-exclusive series, it might not have as much appeal to people who aren't already fans of The Mandalorian... Star Wars: Starfighter, on the other hand, will be accessible to everyone equally. It's set five years after The Rise of Skywalker, which is an unexplored period for the Star Wars franchise onscreen. It's also expected that most, if not all of its featured characters will be brand-new, so no knowledge of past adventures is required. Slashdot reader gaiageek reminds us that 2027 will also see a special 50-year anniversary event in movie in theatres: a "newly restored" version of the original 1977 Star Wars. Read more of this story at Slashdot.

  • US Threatens Anthropic with 'Supply-Chain Risk' Designation. OpenAI Signs New War Department Deal
    by EditorDavid on 28/02/2026 at 8:34 pm

    It started Friday when all U.S. federal agencies were ordered to "immediately cease" using Anthropic's AI technology after contract negotiations stalled when Anthropic requested prohibitions against mass domestic surveillance or fully autonomous weapons. But later Friday there were even more repercussions... In a post to his 1.1 million followers on X.com, U.S. Secretary of War Pete Hegseth criticized Anthropic for what he called "a master class in arrogance and betrayal as well as a textbook case of how not to do business with the United States Government or the Pentagon." Our position has never wavered and will never waver: the Department of War must have full, unrestricted access to Anthropic's models for every LAWFUL purpose in defense of the Republic... Cloaked in the sanctimonious rhetoric of "effective altruism," [Anthropic and CEO Dario Amodei] have attempted to strong-arm the United States military into submission — a cowardly act of corporate virtue-signaling that places Silicon Valley ideology above American lives. The Terms of Service of Anthropic's defective altruism will never outweigh the safety, the readiness, or the lives of American troops on the battlefield. Their true objective is unmistakable: to seize veto power over the operational decisions of the United States military. That is unacceptable... In conjunction with the President's directive for the Federal Government to cease all use of Anthropic's technology, I am directing the Department of War to designate Anthropic a Supply-Chain Risk to National Security. Effective immediately, no contractor, supplier, or partner that does business with the United States military may conduct any commercial activity with Anthropic... America's warfighters will never be held hostage by the ideological whims of Big Tech. This decision is final. Meanwhile, Anthrophic said on Friday that "no amount of intimidation or punishment from the Department of War will change our position." (And "We will challenge any supply chain risk designation in court.") Designating Anthropic as a supply chain risk would be an unprecedented action — one historically reserved for US adversaries, never before publicly applied to an American company. We are deeply saddened by these developments. As the first frontier AI company to deploy models in the US government's classified networks, Anthropic has supported American warfighters since June 2024 and has every intention of continuing to do so. We believe this designation would both be legally unsound and set a dangerous precedent for any American company that negotiates with the government... Secretary Hegseth has implied this designation would restrict anyone who does business with the military from doing business with Anthropic. The Secretary does not have the statutory authority to back up this statement. Anthropic also defended the two exceptions they'd requested that had stalled contract negotiations. "[W]e do not believe that today's frontier AI models are reliable enough to be used in fully autonomous weapons. Allowing current models to be used in this way would endanger America's warfighters and civilians. Second, we believe that mass domestic surveillance of Americans constitutes a violation of fundamental rights." Also Friday, OpenAI announced that "we reached an agreement with the Department of War to deploy our models in their classified network." OpenAI CEO Sam Altman emphasized that the agreement retains and confirms OpenAI's own prohibitions against using their products for domestic mass surveillance — and requires "human responsibility" for the use of force including for autonomous weapon systems. "The Department of War agrees with these principles, reflects them in law and policy, and we put them into our agreement. We also will build technical safeguards to ensure our models behave as they should, which the Department of War also wanted. " We are asking the Department of War to offer these same terms to all AI companies, which in our opinion we think everyone should be willing to accept. We have expressed our strong desire to see things de-escalate away from legal and governmental actions and towards reasonable agreements. We remain committed to serve all of humanity as best we can. The world is a complicated, messy, and sometimes dangerous place. Read more of this story at Slashdot.

  • Antarctica's Massive Neutrino Observatory Gets an Upgrade
    by EditorDavid on 28/02/2026 at 7:34 pm

    There's already 5,000 sensors embedded in Antarctica's ice to look for evidence of neutrinos, reports the Washington Post. But in November scientists drilled six new holes at least a mile and a half deep and installed cables with hundreds more light detectors — an upgrade to the massive 15-year-old IceCube Neutrino Observatory to detect the charged particles produced by lower-energy neutrinos interacting with matter: When they do, the neutrinos produce charged particles that travel through the ice at nearly the speed of light, creating a blue glow called Cherenkov radiation... "Within the first couple years, we should be making much better measurements," [said Erin O'Sullivan, an associate professor of physics at Uppsala University in Sweden and a spokesperson for the project.] "There's hope to expand the detector, by an order of magnitude in volume, so the important thing there is we're not just seeing a few neutrino point sources, but we're starting to be a true telescope. ... That's really the dream." The scientists spent seven years planning the upgrade, according to the article. "To drill holes a mile and a half deep takes about 30 hours, and 18 more hours to return to the surface," the article points out. "Then, the race begins because almost immediately, the hole starts to shrink as the water refreezes." ("If it takes too much time, the principal investigator says, "the instruments don't fit in anymore!") Read more of this story at Slashdot.

  • 'World's Largest Battery' Soon At Google Data Center: 100-Hour Iron-Air Storage
    by EditorDavid on 28/02/2026 at 6:34 pm

    Interesting Engineering reports: US tech giant Google announced on Tuesday that it will build a new data center in Pine Island, Minnesota. The new facility will be powered by 1.9 gigawatts (GW) of clean energy from wind and solar, coupled with a 300-megawatt battery, claimed to be the 'world's largest', with a 30-gigawatt-hour (GWh) capacity and 100-hour duration... The planned battery would dwarf a 19 GW lithium-ion project in the UAE... Form Energy's batteries work very differently from most large batteries today. Instead of using lithium like the batteries in electric cars, they store electricity by making iron rust and then reversing the rusting process to release the energy when needed... Form's iron-air batteries are heavier and less efficient than their counterparts; they can only return about 50% to 70% of the energy used to charge them, while lithium-ion batteries return more than 90%. However, Form's batteries have one distinct advantage. They are cheaper than lithium-ion batteries, costing about $20 per kilowatt-hour of storage, which is almost three times as cheap... It will store 150 MWh of electricity and can supply to the grid for up to 100 hours, delivering about 1.5 MW at peak output. Thanks to long-time Slashdot reader schwit1 for sharing the article. Read more of this story at Slashdot.

  • After US-Israel Attacks, 90 Million Iranians Lose Internet Connectivity
    by EditorDavid on 28/02/2026 at 5:35 pm

    CNN reports that images from Iran's capital "have shown cars jammed along Tehran's street, with heavy traffic on major roads after today's wave of attacks by the US and Israel." And though Iran has a population of 93 million, the attacks suddenly plunged Iran into "a near-total internet blackout with national connectivity at 4% of ordinary levels," according to internet monitoring experts at NetBlocks. CNN reports: Since Iran's brutal crackdown earlier this year, the regime has made progress to allow only a subset of people with security clearance to access the international web, experts said. After previous internet shutdowns, some platforms never returned. The Iranian government blocked Instagram after the internet shutdown and protests in 2022, and the popular messaging app Telegram following protests in 2018. The International Atomic Energy Agency announced an hour ago that they're "closely monitoring developments" — keeping in contact with countries in the region and so far seeing "no evidence of any radiological impact." They're also urging "restraint to avoid any nuclear safety risks to people in the region." UPDATE (1 PM PST): Qatar, Bahrain and Kuwait "are shifting to remote learning starting Sunday until further notice following Iranâ(TM)s retaliatory strikes on Saturday," reports CNN. Read more of this story at Slashdot.

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