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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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  • Sainsbury's Store Pauses Facial Recognition After False Shoplifting Claim
    by BeauHD on 18/08/2026 at 11:00 am

    Bruce66423 shares a report from The Guardian: Sainsbury's has paused the use of AI face scanning in one of its stores after a customer was wrongly identified as a shoplifter and ejected from the shop. "I was embarrassed, mortified even, and felt quite humiliated and powerless," Matt Arnold, 46, said of his ordeal. The comedy promoter was buying supplies in the store in East Dulwich, in south-east London, for a standup event at Dulwich Hamlet football club when, after scanning his items and a Nectar card, he was approached by two managers who told him he could not be served owing to an earlier incident. He was then asked to leave and they tried to escort him from the store. As he left, he saw an overhead CCTV monitor alert with a red circle surrounding his face. He asked the shop staff to keep his shopping in the trolley so his friend could come and pick up the supplies for the comedy night happening soon next door. "I think they were quite confused by this, understandably, but agreed and my colleague Dave went in to pay for and pick up the shop about five minutes later. There was no pause for thought from the staff, no suggestion that they understood this is not how a shoplifter would behave. Just blindly following the machine's orders." Sainsbury's head office apologised to Arnold the next day and has paused use of its AI-assisted Facewatch technology in the store while an investigation takes place. Arnold says the facial recognition tech should be paused in all stores. "Anyone could be falsely accused and at some point that will be someone vulnerable, someone with mental health issues like anxiety. It's inevitable," said Arnold. "Also, I would worry about the confidence-destroying effect of it happening to a younger person or someone less willing or able to stand up for themselves as I have done." A Sainsbury's spokesperson said: "We have contacted Mr Arnold to apologise for his experience at our Dulwich superstore. The incident was caused by human error, not the facial recognition technology. Customers can be reassured that the Facewatch system has a 99.98% accuracy rate, and every match is reviewed by a trained manager." A Facewatch spokesperson said their technology was not at fault in this case. "A correct alert was sent to the retailer, but was subsequently subject to human error in the way it was handled in store," they said. Read more of this story at Slashdot.

  • Solar Power and Batteries Have Been Keeping Europe's Grid Stable
    by BeauHD on 18/08/2026 at 7:33 am

    AleRunner writes: "Solar has been doing the 'heavy lifting' to help Europe meet its energy needs amid a string of blistering heatwaves," Euronews tells us. Meanwhile, as Europe's energy demands rise with the heat, jellyfish have been causing shutdowns and reduced power output at multiple reactors at French nuclear plants, as we already discussed. Euronews reports: A new analysis from energy think-tank Ember found that solar output in European countries rose by up to 17 percent on heatwave days in June and July. Researchers say that this helped power the grid as electricity demand increased by as much as a quarter on hot days. Heatwaves often trigger a spike in electricity consumption due to the sudden need for cooling, mainly from energy-intensive air conditioning (A/C) units. The International Energy Agency (IEA) estimates that space cooling, which is mostly A/C units and fans, consumed around seven percent of the world's electricity in 2022. Even in countries where A/C ownership is low, countries experience energy demand spikes when scorching temperatures hit. During the early summer heatwaves of 2025, France, for example, recorded an evening electricity peak that was 25 percent above the off-season average due to air conditioning. Ember's analysis found that during the late-June heatwave this summer, daily electricity demand rose byup to 28 percent in Italy, 23 percent in Hungary, 14 percent in France and 13 percent in Spain compared with pre-heatwave days. It says as heatwave-driven demand increased, solar was the only major power source to perform "better than usual." Compared with other days in June and July, average daily solar generation during the heatwaves was 17 percent higher in France and Hungary, five percent higher in Spain and the same in Italy. Read more of this story at Slashdot.

  • 'Buy Now, Pay Later' Lenders Pitch Loans For Needs Like Electricity and Rent
    by BeauHD on 18/08/2026 at 3:30 am

    An anonymous reader quotes a report from The New York Times: Buy now, pay later" loans took off during the pandemic as a way for online shoppers to go on retail splurges without using a credit card. Now, lenders are offering the loans as a means for people to finance basic households needs. The lending apps Flex and Zip allow customers to take out loans to pay for their broadband, electricity, health insurance, mobile phone service, mortgage and water bills. Affirm, one of the most popular pay-later apps, has started providing some tenants loans to extend their monthly rent payment for a few weeks. Many dentists, veterinarians and medical clinics now often offer instant pay-later financing, and Intuit this year started promoting "File Now, Pay Later" loans to TurboTax users who owe money in their tax return. Pay-later loans are becoming the "working capital for the modern middle class," said Karen Webster, the chief executive of Pymnts, a news and market research company for the payments industry. "Consumers are using it more for essential, everyday things." Americans spent $160 billion last year through pay-later loans, according to research released recently by Federal Reserve economists -- nearly twice what consumers spent two years earlier, in 2023. That's still a fraction of the more than $3 trillion U.S. shoppers spend annually on consumer credit cards. But the industry continues to expand by double-digit rates each year. How much of that growth reflects consumer preferences, versus desperation, is a question economists and industry analysts are trying to unravel. The rise in pay-later financing comes as many households are leaning more on debt to keep up with their daily expenses. Paying interest -- to afford basic needs -- adds to the overall cost of living, which has already been rising amid higher medical, housing and fuel costs. For many borrowers, the loans have become their only option: Half of those using them said they could not make ends meet otherwise, according to the latest edition of a survey that LendingTree, a loan marketplace, has compiled for years. Read more of this story at Slashdot.

  • Supreme Court Rejects Verizon Bid For $47 Million Refund of FCC Fine
    by BeauHD on 17/08/2026 at 11:00 pm

    An anonymous reader quotes a report from Ars Technica: The Supreme Court today rejected Verizon's attempt to get a $47 million refund from the Federal Communications Commission. In a list of orders (PDF) issued by the court, Verizon's petition was denied without explanation. The denial apparently ends any possibility of Verizon asking a lower court to review the fine and order the FCC to issue a refund. However, AT&T and T-Mobile are continuing to challenge similar fines on grounds that selling device-location data did not violate US telecom law. AT&T, T-Mobile, and Verizon were fined a total of $196 million in 2024 for selling mobile users' real-time location data without their customers' consent. The carriers sold device-location information to data aggregators, who resold it to other firms. The carriers paid the fines and sought to have them overturned in courts, claiming their Seventh Amendment right to a jury trial was violated. Challenges by AT&T and Verizon were combined into a single case, and the Supreme Court ruled against the carriers in June of this year. The court ruled that the FCC penalty process does not violate the Seventh Amendment because the carriers could have obtained jury trials if they refused to pay the fines and waited for the government to try to collect. The ruling (PDF) against the carriers was 8-1, with Justice Clarence Thomas dissenting. Read more of this story at Slashdot.

  • Apple Wallet Driver's License Feature to Launch in Four More US States
    by BeauHD on 17/08/2026 at 10:00 pm

    Apple Wallet's driver's license and state ID feature is set to expand to North Carolina, Oklahoma, Utah, and Virginia, bringing the total to 18 states plus Puerto Rico. The digital IDs can be used at participating TSA checkpoints and businesses without handing over or unlocking an iPhone, though users are still generally advised to carry a physical ID because acceptance remains limited. MacRumors reports: A few days ago, North Carolina's DMV announced that it plans to launch a mobile ID program later this year. As reported by WRAL, North Carolina residents will be able to set up a digital ID through a new NC Wallet app starting in December, with Apple Wallet, Google Wallet, and Samsung Wallet support to follow in "early 2027." As mentioned, you do not need to unlock, show, or hand over your device to present an Apple Wallet ID in person, ensuring user privacy. Apple Wallet IDs are generally not accepted by law enforcement, so carrying a physical ID is still legally required for traffic stops. In addition, the number of businesses that accept Apple Wallet IDs is still quite small. At least for now, Apple Wallet IDs are designed to be a convenient alternative where they are accepted. "Your mobile ID is a valid form of identification in North Carolina," the DMV said, in a FAQ on its website. "However, as retailers, restaurants and other businesses transition to mobile IDs, some may not be set up to accept them right away. For now, carrying your physical card gives you a backup when needed." According to code seen by MacRumors, Apple Wallet IDs are also coming to Oklahoma, Utah, and Virginia, but there is no timeframe for availability. Read more of this story at Slashdot.

  • Judge Sets Framework For Nine PBS to Retrieve 70 Years of Archival TV Data
    by BeauHD on 17/08/2026 at 9:00 pm

    District Court Judge Eric Elliff has ordered Iron Mountain to cooperate with Nine PBS in recovering roughly 50TB of archival material stored through now-defunct vendor OSS. "He found that the station is the rightful owner of the materials and entitled to recover them from OSS' storage systems," reports Current.org. Nine PBS must identify a third party to help retrieve the files, pay outstanding storage fees, and ensure that data belonging to other OSS customers isn't disturbed or accidentally recovered. From the report: Under his order, Nine PBS is to identify a third-party vendor, such as a former OSS employee, who can assist in accessing and retrieving the data from the infrastructure that's housed in Iron Mountain's center within 30 days. Elliff acknowledged the complexities of Iron Mountain's position as a vendor to OSS, which, according to Nine PBS' complaint, is in delinquency. Iron Mountain is the "custodian" of Nine PBS' data, but it isn't the vendor that contracted with the station to store and preserve its data. That obligation remains with OSS. Under the order, Nine PBS will pay Iron Mountain current and past-due fees for data storage, starting from when OSS stopped paying Iron Mountain for use of its data storage facility. During the hearing, Gregory Rich, an attorney representing Nine PBS, said the station seeks access to a physical cage where the data is housed within Iron Mountain's facility. The station is in contact with a former OSS employee who is willing to help obtain the data. The attorney noted that the data could potentially be stored in physical form, such as tapes that could be easily retrieved. But if the materials are on a server, Nine PBS could lose the materials forever if Iron Mountain shuts it down. William Cravens, the attorney representing Iron Mountain, told the judge his client doesn't know the format of Nine PBS' materials that were stored by OSS. He expressed concern about whether Nine PBS' archival material is lumped together with data from other OSS clients. Iron Mountain wants to avoid potentially corrupting the other data, Cravens added. Elliff ordered the immediate return of any physical devices that hold Nine PBS' data once access to OSS' storage system is granted. If data retrieval turns out to be more complicated -- if it is encrypted, for example -- he will schedule another hearing to determine how to proceed. Once Nine PBS retrieves its data, the station must work with a third party to ensure that no data from other OSS customers is among those materials. Read more of this story at Slashdot.

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