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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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  • Group of Teen Hikers Relied on Google Maps. It Was a Disaster.
    by EditorDavid on 02/08/2026 at 5:34 pm

    "When a group of teenagers set out to hike British Columbia's famed Howe Sound Crest Trail in early July, Google Maps suggested the trek would take about five hours," reports SFGate. "Instead, the hike stretched deep into the night, leaving the group exhausted, dehydrated, injured and in need of a helicopter rescue..." Although the approximately 18-mile route with a 6,000-foot elevation gain can be completed by experienced trail runners in a day, search and rescue officials generally recommend hikers treat it as a two-day backpacking trip. The teenagers, all 17 years old, believed Google Maps' estimate that the route would take about five hours. The printed directions they were carrying, which were shared publicly by Lions Bay Search and Rescue, gave simple instructions for two legs of the trail, but didn't account for the terrain or elevation. "[Google Maps] is calculating the time that you're walking a straight road on pavement," [said Maria Masiar, training officer and search manager with Lions Bay Search and Rescue]. "When you get into outdoor terrain, that no longer holds true." Expecting only a short outing, each hiker carried about half a liter of water and limited food. There are no reliable water sources along the trail, meaning hikers must carry enough supplies for the entire route. As the group climbed, they began suffering from dehydration and muscle cramps but continued onward despite falling dramatically behind schedule. Eventually, the group made the decision to turn back and abandon making it to the end of the trail — and as the sun began to set and the group started to descend, fatigue took its toll. According to Masiar, members of the group had already stumbled and fallen several times while trying to race the coming dark, and only one hiker had a headlamp. Eventually, another hiker slipped about 10 feet off a boulder, injuring his tailbone badly enough that he could no longer continue. Search and rescue crews responded, ultimately evacuating him by helicopter. Read more of this story at Slashdot.

  • Does Eating Less Protein Produce Healthier Aging and Metabolism?
    by EditorDavid on 02/08/2026 at 4:34 pm

    "A major scientific review is challenging the idea that more protein is always better," reports ABC News: The review, led by pathologist and biomedical researcher Dudley Lamming and published in the journal Cell Press Blue, examined more than 350 studies involving humans, mice, insects, yeast, and other organisms. The review found that eating less protein, or less of certain amino acids that make up protein, may turn on body processes linked to healthier aging, as well as metabolism, the process by which the body turns food and drinks into energy... For adults who already get enough, eating more protein may offer little benefit, while some research suggests that eating less protein could support healthier aging... Lamming reviewed the effect of reducing protein in many body processes. One of the processes involves a hormone called FGF21. "There's an increase in a hormone called FGF21 that promotes energy expenditure [when protein intake is reduced]," Lamming said. "It essentially increases thermogenesis in your adipose tissue, so you don't just store fat, but actually burn it as fuel." This may help explain why some studies connect lower-protein diets with less body fat, better blood sugar control and a healthier metabolism. Eating less protein may also affect signals that tell cells when to grow, repair damage or recycle old cell parts. These jobs may play a role in aging. However, protein restriction is not the same as protein deficiency. The goal is not to deprive the body of an essential nutrient. Instead, the research raises the possibility that avoiding unnecessary excess could benefit some people who already consume enough... Before reaching for another high-protein product, a better question may be: How much protein does my body actually need? Read more of this story at Slashdot.

  • In a First, 'Super-Earth' Planet Shows It Could Have an Atmosphere
    by EditorDavid on 02/08/2026 at 3:34 pm

    "Scientists say they have detected promising signs that a planet orbiting a star 49 light-years from Earth could have an atmosphere," reports CNN, "making it potentially suitable for life." Called LHS 1140b, the object is about five times the mass of our planet, or a "super-Earth." This planet orbits around its star in the "Goldilocks zone," also known as the habitable zone, meaning its surface temperature is not too hot or too cold for liquid water to exist... "It appears to be consistent with Earth, meaning it might have an iron core and a silicate mantle, plus some sort of low-density component, which is probably a combination of water and, now we know, an atmosphere," [said Collin Cherubim, a planetary scientist and lead author of a paper on the finding, published July 16 in the journal Science]... If further observations confirm the findings, LHS 1140b would mark the first discovery of an atmosphere on a rocky planet in the habitable zone of another star... There is no evidence of life or a life-supporting atmosphere on LHS 1140b now, but Cherubim said he believes it's a formidable candidate for potential signatures of extraterrestrial life. "I think it's the best place to look for life outside the solar system at this point," he said. "It's mostly rocky, it's at the right temperature to support liquid water on the surface, and it has an atmosphere — those are the three key ingredients we look for..." Confirming the existence of an atmosphere on a rocky planet orbiting a red dwarf would be particularly exciting, Cherubim said, because the possibility of that happening is an open question in astronomy. "Can rocky planets have atmospheres around red dwarfs? This is the first bona fide yes," he said. "It's kind of a sigh of relief for a lot of us. But the jury's still out. Maybe this is a weird planet, and it's an oddball, or maybe it's the first of many. We don't know yet." Now "The James Webb Space Telescope is going to look at it," Cherubim told CNN, and "Hubble's going to look at it. Basically, everybody who can see it is going to be training their eyes on it." Michaël Gillon, research director of the Astrobiology Research Unit at Belgium's University of Liège warned CNN that no definitive proof exists that LHS 1140b possesses a substantial atmosphere. But if the detection of helium can be confirmed, the implications would be profound. "Until now, we had only limited evidence for atmospheres on temperate rocky exoplanets. Demonstrating that LHS 1140 b has retained a substantial atmosphere over billions of years would show that at least some habitable zone Super-Earths around red dwarfs can survive the intense early activity of their host stars." Read more of this story at Slashdot.

  • Linux Desktop Market Share Surpasses 10% in North America
    by EditorDavid on 02/08/2026 at 2:04 pm

    The blog Linuxiac reports: Linux has crossed a major milestone in North America, with the open-source operating system now accounting for 10.65% of desktop usage in the region, according to Statcounter's latest figures for July 2026. The result places Linux firmly in double-digit territory for the first time in Statcounter's North American desktop operating system statistics. For comparison, Statcounter recorded Linux at 5.52% in June 2026, so the share nearly doubled in one month... However, the sharp monthly increase needs context. Statcounter's June figures included an "Unknown" category that accounted for 9.24% of North American desktop usage. Its reduction seems to have coincided with Linux's rise, possibly indicating better identification of previously unclassified traffic... Statcounter is not the only major web measurement platform showing Linux with a substantial presence on North American desktops. Cloudflare Radar data, filtered to desktop HTTP traffic from North America over the previous 28 days, also places Linux at a notably high level [9.4%]. StatCounter's data also shows Linux with an even larger market share of 11.87% in just the United States — and a 14.73% market share in India. Linux's market share in other world regions: Asia 7.17% Africa 5.71% Europe 5.49% South America 4.35% China 2.12% And here's how the Linux market share on other countries compare to India and the U.S. India 14.73% United States 11.87% Germany 7.24% UK 6.18% Canada 3.83% Australia 3.55% Linux's surge could be due to its use in automation or headless browser workloads, Linuxiac points out. But another possibility is "growing frustration with Windows hardware requirements, advertising, account integration, telemetry, and forced interface changes has pushed some users to explore alternatives..." "For now, the safest conclusion is that Linux has surpassed 10% of measured desktop web usage in North America according to Statcounter, not necessarily 10% of the region's installed desktop computer base." Read more of this story at Slashdot.

  • Are Return-to-Office Mandates Killing Workers' Trust in Workplaces?
    by EditorDavid on 02/08/2026 at 11:34 am

    The Hill published the thoughts of Gleb Tsipursky, Ph.D., who serves as the CEO of the future-of-work consultancy Disaster Avoidance Experts: A recent EnhancV survey of 1,000 full-time U.S. workers subject to new or stricter return-to-office policies found that 72% suspect these mandates are really a voluntary attrition strategy — a strategy by their own employers to make them quit their jobs. A full 46% admit to the practice of coffee-badging. Thirty-six percent have applied for a new job while sitting at their current office desk. Thirty-six percent have started a side hustle since the mandate was announced, in anticipation of being let go or quitting. Those numbers do not prove that employees reject collaboration. They show that many employees no longer trust the official story... The central mistake in many in-office mandates is the assumption that proximity automatically produces commitment. It does not. A worker who spends two hours commuting to sit on video calls with colleagues in other cities is not experiencing culture. That worker is experiencing theater. When executives describe the office as a cure-all, many employees experience lost time, higher costs and lower autonomy. The policy's defining feature becomes its credibility gap. Research keeps undercutting the belief that more office time automatically means better performance. A University of Pittsburgh analysis of S&P 500 firms found that return-to-office mandates reduced employee satisfaction without improving firm performance or firm value.... Baylor University's reporting on office mandates and brain drain found that firms with mandates faced greater turnover among women, senior employees, managers and high-skilled workers, while job vacancy duration increased and hiring rates declined. In other words, the people with the most options are often the first to leave. The employees who remain may not be the most committed — they may simply be the least mobile... Attendance can be mandated, but commitment cannot. When leaders confuse the two, they do not rebuild workplace culture. They create a room full of people planning their exit. Read more of this story at Slashdot.

  • As New York Finalizes New Social Media Rules, US Senate Considers Nationwide 'SCREEN' Act
    by EditorDavid on 02/08/2026 at 7:34 am

    New York has finalized new rules that will govern social media apps in the state starting on January 25, 2027. The law prohibits social media platforms from sending notifications to minors between midnight and 6 a.m. without parental consent. And minors "will only be shown content from other accounts they follow or otherwise select in a set sequence, such as chronological order," rather than "the default algorithmically personalized feeds... unless they get parental consent for an addictive feed." (Social media companies "must offer at least one alternative method for age assurance besides providing a government-issued ID," the announcements points out, and any information used to determine age "must not be used for any other purpose and must be deleted or de-identified immediately after its intended use.") But meanwhile, the EFF writes that a committee in the U.S. Senate is considering the SCREEN ACT, "a sweeping age-verification bill that would require online services to verify users' ages before they can access any sexually explicit content. If this bill passes, it will force millions of adult internet users to give up their anonymity, privacy, and security before they access lawful speech." Unlike many state-age verification laws — which have been harmful in their own right — the SCREEN Act has no requirement that a significant portion of the website consist of sexually explicit content that is harmful to minors. The bill requires nearly any service hosting even a single piece of sexually explicit content to verify the ages of its users. The result is that the bill would apply not only to adult content sites like PornHub or OnlyFans, but also streaming services like Netflix, and social media platforms like Reddit, Discord, or Bluesky, if they host any adult content... Under the SCREEN Act, the "bouncer" will be a digital age-verification service that captures your personal information and saves it to a database for an unspecified amount of time. The consequences of the bill won't be limited to minors. If websites and apps are expected to reliably identify teenagers, adults will be asked to prove they are adults. Even worse, the SCREEN Act is a privacy and data security nightmare. One provision of the bill requires services to take reasonable steps to protect the data collected and to not maintain for longer than is necessary. But these are terribly weak protections that impose no meaningful collection, use, or retention limits on services collecting people's private information... The SCREEN Act also targets virtual private network (VPN) users and providers. The bill requires covered websites to verify users' ages based on their IP addresses unless the service can determine that the user is outside the United States, and specifically requires age verification on traffic coming from known VPN addresses. In practice, this discourages the use of VPNs and proxy servers, which millions of people rely on for legitimate purposes such as protecting personal privacy, securing public Wi-Fi connections, safeguarding journalists and activists, and preventing data tracking... The SCREEN Act creates onerous age-verification rules that will block adults from accessing lawful speech, curtail their ability to be anonymous, and jeopardize the data security and privacy of all internet users. Read more of this story at Slashdot.

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