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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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  • Dozens of Robotaxi Riders Are Falling Asleep, Sparking Frantic Calls For Emergency Services
    by EditorDavid on 19/07/2026 at 11:09 pm

    "If tired or wasted passengers fall asleep in a traditional taxi or rideshare, the driver can shout or shake them awake," reports Bloomberg. "Not so in a robotaxi..." Ditto Kasendar remembers soft music drifting from the robotaxi's speakers as he rode home late at night from a friend's birthday party in 2025. The next moment, Los Angeles firefighters were opening the door and asking if he was OK. His six-minute trip had ended nearly an hour before. A remote Waymo assistant, dialling in through the car's speakers, repeatedly tried to rouse him and finally called 911 when he wouldn't stir... Kasendar's robocab nap was, unfortunately, not an isolated incident. As companies like Alphabet and Tesla bring self-driving taxis to more cities, the messier aspects of serving unpredictable humans are becoming harder to ignore. Passengers are falling asleep, spilling drinks, dropping food, vomiting, experiencing medical emergencies and, in at least two instances, giving birth in the cars. They stumble out of the vehicles and forget to close the doors, forcing the operators to pay nearby gig workers to do it. These seemingly minor nuisances are becoming a drain on municipal resources and complicating the roll-out of robotaxi service. So many robotaxi customers have nodded off in the midst of a ride that Austin police and firefighters even have a name for the incidents: "sleepers". The Texas capital recorded 99 such calls in Waymo's first nine months of service there, said Roger Patterson, a commander with Austin-Travis County Emergency Medical Services... Remote assistants monitoring the cars try talking through the speakers and checking on passengers with interior cameras. But if they get no response, company protocols often require them to call 911. And first responders have to assume the worst. Austin dispatchers treat an incident as a potential heart attack if the remote assistant can't tell whether the passenger is breathing, Patterson said. In the end, only about 3% of such calls require transporting the passenger to a hospital, he said. But the incidents tie up personnel who might be needed elsewhere. Read more of this story at Slashdot.

  • California's 'Truth in Recycling' Law Blocked by Judge
    by EditorDavid on 19/07/2026 at 9:04 pm

    An anonymous reader shared this report from the Los Angeles Times: A federal judge has halted California's groundbreaking "Truth in Recycling" law, which aims to reduce consumer confusion about which packaging can be recycled. [Originally planned to take effect October 4th], California's recyclable packaging law prohibits manufacturers from using a "chasing arrows" recycling symbol on products or materials unless they are actually being recycled in a meaningful way, which the law quantifies... A coalition of farming, forestry, restaurant and packaging organizations sued the state in March, arguing the law violates their right to free speech. They argued that Senate Bill 343 operates as "government-imposed censorship." Judge William Hayes agreed that their challenge has merit, and on Tuesday ordered California Atty. Gen. Rob Bonta, the defendant in the case, to pause enforcement of the law "until further order of the Court...." Advocates of reducing plastic use disagreed. "The court got it wrong, and I'm confident that the state will ultimately prevail," said Nick Lapis, director of advocacy for Californians Against Waste. "S.B. 343 does not violate the 1st Amendment; it requires companies to tell the truth when they make recyclability claims. Suggesting that the 1st Amendment protects misleading environmental marketing is inconsistent with the basic principles of consumer protection that states like California have implemented for decades." In January, CalRecycle, the state's waste agency, reported that less than 10% of most single-use plastic materials in the state were being recycled. Even yogurt containers and margarine tubs — made of ubiquitous polypropylene, or No. 5 plastic — are being recycled at a rate of only 2% in the state, the report said. Only 5% of colored shampoo and detergent bottles, made from polyethylene, or No. 1 plastic, are getting recycled... Plastic materials that can't be recycled are typically sent to landfills or sometimes illegally shipped overseas, where they are burned or end up in landfills, rivers and waterways. The bill's author told the Los Angeles Times "All you have to do is look at the numbers. These products are not getting recycled, despite what the industry is claiming. They are just confusing consumers, clogging the waste stream, polluting the environment, leading to higher and higher prices for local governments and ratepayers." He argues the symbols shouldn't be used to "confuse people who see the symbols [on products] and assume they can be recycled." The article also quotes Judith Enck, former Environmental Protection Agency regional administrator and president of the nonprofit Beyond Plastics. "Given the long history of the plastics industry deceiving the public about plastics recycling, this is an especially bad outcome. It is a reminder that the plastics industry has enough money to fight even the most modest policy designed to protect people and the planet." Read more of this story at Slashdot.

  • James Webb Space Telescope Discovers How Black Holes Feed Themselves
    by EditorDavid on 19/07/2026 at 7:05 pm

    "Thanks to the James Webb Space Telescope, astronomers have been given a glimpse of the mechanisms that supermassive black holes use to feed themselves," reports Space.com: The powerful cosmic titans get really puzzling when astronomers using the JWST spot them before the universe was even 1 billion years old. That's because the mechanisms by which black holes devour matter to grow and then merge to create even more massive black holes should take at least 1 billion years to achieve supermassive status. This is even more confusing because theories also say the most ravenously feeding black holes (and thus the fastest growing) should also push the matter they use for this growth away, in effect putting themselves on a diet. So, with all this in mind, how did supermassive black holes grow so rapidly in the early universe? One explanation suggests supermassive black holes push away gas, starving themselves as predicted, but also that this matter eventually cools and falls back to the black hole. That would allow for another period of feeding and thus growth. This explanation further suggests that as this gas cools down, it forms "streamers," or filaments, of gas just a few hundred light-years wide but which stretch thousands of light-years long. These would fall back to the center of the galaxy and form a swirling disk around its incumbent black hole, once again feeding it and triggering a new period of growth. This would then restart the jets from the black hole, which would again cut off the cosmic titan's food supply, allowing the whole process to begin once more. The process would in essence be a self-regulating cycle of feasting followed by fasting. However, the connection between these filaments and supermassive black holes has been elusive, meaning this mechanism has resisted confirmation. To solve the mystery of feasting black holes, the JWST turned its attention to a relatively close AGN situated at the heart of the central galaxy of the Centaurus Cluster, NGC 4696, located just 145 million light-years from Earth. The Hubble Space Telescope previously studied this galaxy, uncovering a strange, hook-shaped swirl of gas near the central supermassive black hole of NGC 4696. The JWST followed up this discovery by producing a detailed map of gas flowing at the heart of the galaxy. This revealed the hook-shaped feature is around 800 light-years wide and is composed of gas moving at incredible speeds of around 1.3 million miles per hour (600 kilometers per second). More excitingly, the swirl of gas appears to be connected to a vast filament of material falling in toward the central supermassive black hole. The team tested the JWST observations against a computer simulation, finding gas in the infalling filament scenario would indeed take a shape similar to that seen in NGC 4696. "JWST is now showing us the final link of this closed loop," team member Helen Russell of the School of Physics and Astronomy at the University of Nottingham in the U.K. said in the statement. "The vast filamentary network of gas flows ultimately funnels gas down to a disk that fuels the black hole." The team's research was published on Wednesday (July 16) in the Astrophysical Journal Letters. "We are finally seeing this self-sustaining cycle in action," team leader Julie Hlavacek-Larrondo of the Université de Montréal said in a statement. Read more of this story at Slashdot.

  • Robot 'Decapitated' in World's First-Ever Humanoid UFC Fight
    by EditorDavid on 19/07/2026 at 5:49 pm

    "A humanoid robot lost its head," reports Newsweek, "during the world's first free-combat tournament for full-sized humanoid robots." The Ultimate Robot Knock-out Legend competition began Thursday in Shenzhen, China, according to the article, with local robotics company EngineAI providing $40,000 of their "T800" robots (yes, named after The Terminator) to 32 participating teams from around the world: A video shared of the combat on YouTube by local news outlet Shenzhen Story, showed that even after one of the robots had its head practically knocked off its shoulders, it continued to fight, throwing punches at its opponent and kicking into the air... [White humanoid robot "White Eagle"] landed a high kick to the head of its black opponent, "Matador," which made the robot's head rock precariously in its socket before rolling completely out of place. The two continued to spar as Matador's head was swinging from its socket until eventually the robot fell, crushing its head underneath its body. Matador tried to scramble back to its feet, but its head flew off and the robot then collapsed back down. The White Eagle did a celebratory dance for the crowd as the fight concluded, and did a move that mimicked that of someone flexing their biceps. The White Eagle waited in the ring, fists still up, as Matador was carried away, occasionally doing a few more dance moves... Per a report by Global Times, the winning team will be awarded a gold championship belt worth $1.44 million (10 million yuan) by the event organizer. It's a strange fight. The robots sometimes seem unaware of where their opponent is, facing the wrong direction or throwing kicks and punches in the air. In the first round White Eagle just knocks over Matador, who then isn't able to stand back up. (And White Eagle again appears to do a victorious dance.) EngineAI's site says they aim to "promote the development of robot combat events toward greater professionalism, scale, and industrialization," while fostering innovation and global collaboration. Thanks to Slashdot reader pbahra for sharing the news. Read more of this story at Slashdot.

  • Windows 10 Still Being Used, Often Unpatched and Insecure
    by EditorDavid on 19/07/2026 at 4:34 pm

    Windows 10 still runs on 16.9% of the Windows devices monitored by asset-tracking service Lansweeper. That's more than one in six, The Register points out. A year ago, the operating system accounted for about half of the machines in its dataset, falling to the low-to-mid 40% range by the time Microsoft ended standard support. The decline continued after that, reaching 18.6% in June, but Lansweeper says migration has now slowed to a crawl... Small and medium-sized businesses are particularly exposed. Lansweeper reckons that 21.4% of machines at small and medium-sized business still run Windows 10, with cost usually being the constraint that keeps the legacy operating system running. The exposure is greater in some sectors, with 23% of healthcare and pharmaceutical systems sticking with Windows 10, while consumer and retail devices hover at 22.7%. According to Lansweeper's data, "a Windows 10 device carries an average of 1,903 active CVEs against 652 on Windows 11. That's a 2.9x gap." Esben Dochy, principal technical evangelist at the company, told The Register that "the Windows 10 average also includes devices that have Extended Security Update patches applied." [According to Lansweeper's figures, 14% of Windows 10 assets have applied Extended Security Update patches.] Part of the problem, according to Lansweeper, is "patch diffing," in which Windows 11 fixes can be reverse-engineered to find flaws in Windows 10. "The supported OS effectively hands attackers a map into the unsupported one," Lansweeper said... Looking at other market share measures such as Statcounter, there was little change in the share of Windows 10 and its successor over the last few months after a surge following the end of support. As Lansweeper noted: "The easy migrations are done. What's left is the hard core: devices that haven't moved because they can't or won't." Lansweeper's evangelist noted that in some cases there is no Windows 11-certified version yet for many medical devices and industrial or retail systems. Read more of this story at Slashdot.

  • Aptera Announces US-Wide Repair Network for Its Upcoming Solar Electric Car
    by EditorDavid on 19/07/2026 at 3:34 pm

    Solar car maker Aptera has "officially announced a repair network partnership which will give owners of its upcoming solar electric car access to thousands of repair shops nationwide," reports Electrek: We recently got a chance to drive the Aptera solar EV and tour the company's factory, and came away both impressed at the progress that has been made, but cognizant of the long road ahead for the company. One question that often gets raised in reference to EV startups is how owners get service on their vehicles, especially those from a small company... So to waylay those fears, Aptera announced a partnership today that unlocks access to 4,300 service shops across the US, through a company called RepairPal. Aptera had been working on this partnership when we saw them at our factory tour, but today they're ready to officially announce it. RepairPal doesn't own its own shops, but instead certifies local shops to work on particular models of car... All shops will get access to Aptera-specific service procedures. Read more of this story at Slashdot.

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