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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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  • Toronto Man Outruns Streetcars To Show Up Sluggish Transit Network
    by BeauHD on 30/12/2025 at 10:00 pm

    An anonymous reader quotes a report from the Guardian: Mac Bauer is fast, but the city's trams, weighing more than 100,000lbs and traveling at a maximum speed of nearly 45mph, should be far faster than him. And yet as of late December, in head-to-head races against streetcars, the 32-year-old remains undefeated in his quest to highlight how sluggish the trams, used by 230,000 people daily, truly are. Some races have pushed him closer to his limits as a runner. On other occasions, the car has been so slow he's had time to nip into a McDonald's before it reaches the last station. "I don't like winning. I really don't. I really, really wish these streetcars were faster than me," he said. "But they're not. And this is the problem." Bauer's rise as a running celebrity and transit critic embodies the mounting frustration of a city beset by chronic delays, congested streets and decades of under-built transit. "Streetcars just shouldn't be stuck in traffic," he said, adding the system also needed more "signal priority" which gives the streetcars lengthened green lights and shortened red lights. Bauer started racing transit vehicles roughly a year ago after he and his wife realized how long it took them to traverse the city. He posted videos of those races to Instagram and quickly transformed into a minor celebrity. Bauer describes his runs as a form of social activism, and his ability to lay bare the absurdities of Toronto's beleaguered public transit system -- a person can outrun a streetcar! -- has struck a nerve with the tens of thousands of commuters who share his Instagram posts. Read more of this story at Slashdot.

  • Cybersecurity Employees Plead Guilty To Ransomware Attacks
    by msmash on 30/12/2025 at 9:21 pm

    Two cybersecurity professionals who spent their careers defending organizations against ransomware attacks have pleaded guilty in a Florida federal court to using ALPHV/BlackCat ransomware to extort American businesses throughout 2023. Ryan Goldberg, a 40-year-old incident response manager from Georgia, and Kevin Martin, a 36-year-old ransomware negotiator from Texas, admitted to conspiring to obstruct commerce through extortion. Between April and December 2023, Goldberg, Martin, and a third unnamed co-conspirator deployed the ransomware against multiple U.S. victims and agreed to pay ALPHV BlackCat's operators a 20% cut of any ransoms received. They successfully extracted approximately $1.2 million in Bitcoin from one victim, splitting their 80% share three ways before laundering the proceeds. Both men face up to 20 years in prison and are scheduled for sentencing on March 12, 2026. The Justice Department noted that all three conspirators possessed specialized skills in securing computer systems against the very attacks they carried out. ALPHV BlackCat has targeted more than 1,000 victims globally and was the subject of an FBI disruption operation in December 2023 that saved victims an estimated $99 million through a custom decryption tool. Read more of this story at Slashdot.

  • Despite a Record Year, Airlines Are Grappling With Big Challenges
    by msmash on 30/12/2025 at 8:42 pm

    The global airline industry is on track to post an all-time profit high of nearly $40 billion in 2025, according to trade group IATA, surpassing the pre-pandemic 2019 figure of $26 billion, but carriers are still managing a net margin of just 4% -- roughly $7.90 per passenger. Economist adds: Not everything has been in the ascent. European and North American airlines, which account for three-fifths of the industry's net profits, have had to contend with circuitous long-haul routes to avoid Russian airspace since the start of the war in Ukraine. This year parts of the Middle East became no-go zones after Israel's strike on Iran in June. America's airlines were hit by a government shutdown that stopped federal workers from travelling and kept unpaid air-traffic controllers at home, disrupting flights. What is more, despite a drop in fuel prices, which account for 25-30% of airlines' operating expenses, other costs have risen. Airlines flew 4.8 billion passengers in 2024, beating the 2019 peak, and that figure likely reached 5 billion in 2025 as combined revenues topped $1 trillion for the first time and load factors hit a record of nearly 84%. But the industry is flying older planes because Boeing and Airbus can't deliver enough new ones. The duopoly shipped under 1,400 aircraft in 2025, well below the 2018 record of just over 1,600. Boeing has struggled since two fatal 737 MAX crashes in late 2018 and early 2019 led to a 20-month grounding, and a fuselage panel blew off another 737 MAX mid-flight in early 2024. Airbus cut its 2025 delivery target from 820 to 790 in early December due to a supplier's production flaw, and Pratt & Whitney engine problems have grounded a third of the global A320neo fleet. IATA estimates the aircraft shortage won't resolve before 2031 at the earliest, and the global fleet's average age has climbed to 15 years from 13 in 2019. Annual fuel efficiency gains have slowed from about 2% to 0.3% in 2025, and an IATA and Oliver Wyman report pegs the cost of aging fleets -- extra fuel, repairs, spare parts -- at over $11 billion in 2025. Read more of this story at Slashdot.

  • Singapore Study Links Heavy Infant Screen Time To Teen Anxiety
    by msmash on 30/12/2025 at 8:01 pm

    A study by a Singapore government agency has found that children exposed to high levels of screen time before age two showed brain development changes linked to slower decision-making and higher anxiety in adolescence, adding to concerns about early digital exposure. From a report: The study was conducted by a team within the country's Agency for Science, Technology and Research and the National University of Singapore, and published in The Lancet's eBioMedicine open access journal. It tracked 168 children for more than a decade, and conducted brain scans on them at three time points. Heavier screen exposure among very young children was associated with "accelerated maturation of brain networks" responsible for vision and cognitive control, the study found. The researchers suggested this may have been the result of "intense sensory stimulation that screens provide." They found that screen time measured at ages three and four, however, did not show the same effects. Those children with "altered brain networks" took longer to make decisions when they were 8.5, and also had higher anxiety symptoms at age 13, the study said. Read more of this story at Slashdot.

  • France Pushes Back Plastic Cup Ban By Four Years
    by msmash on 30/12/2025 at 7:21 pm

    An anonymous reader shares a report: The French government on Dec 30 postponed a ban on plastic throwaway cups by four years to 2030 because of difficulties finding alternatives. The ban was meant to start on Jan 1. But the Ministry for Ecological Transition said the "technical feasibility of eliminating plastic from cups" following a review in 2025 justified pushing back the deadline. It said in an official decree that a new review would be carried out in 2028 of "progress made in replacing single-use plastic cups." It added that the ban would now start Jan 1, 2030, when companies would have 12 months to get rid of their stock. France has gradually rolled out bans on single-use plastic products over the past decade as environmental campaigners have stepped up warnings about the impact on rivers and oceans. Read more of this story at Slashdot.

  • New York's MetroCard Era Ends After 31 Years
    by msmash on 30/12/2025 at 6:41 pm

    After more than three decades of service, New York City's iconic MetroCard is about to retire, as December 31, 2025 marks the final day commuters can purchase or refill the gold-hued plastic cards that replaced subway tokens back in 1994. The Metropolitan Transportation Authority has been transitioning to OMNY, a contactless payment system introduced in 2019 that lets riders tap a credit card, phone or smart device at turnstiles. More than 90% of subway and bus trips are now paid using the tap-and-go system, and the agency says the changeover saves at least $20 million annually in MetroCard-related costs. The new system also introduces automatic fare capping: riders get unlimited travel within a seven-day period after 12 paid rides, maxing out at $35 a week once fares rise to $3 in January. Riders who prefer not to link a credit card or phone can purchase reloadable OMNY cards. Existing MetroCards will continue to work into 2026, allowing riders time to use up remaining balances. The MetroCard's arrival in 1994 was itself a significant shift from the brass tokens that had been in use since 1953. London and Singapore have long operated similar contactless systems; San Francisco launched its own tap-to-pay system earlier this year, joining Chicago and other U.S. cities. Read more of this story at Slashdot.

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