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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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  • Denver Detectives Crack Deadly Arson Case Using Teens' Google Search Histories
    by msmash on 22/05/2025 at 5:00 am

    Three teenagers nearly escaped prosecution for a 2020 house fire that killed five people until Denver police discovered a novel investigative technique: requesting Google search histories for specific terms. Kevin Bui, Gavin Seymour, and Dillon Siebert had burned down a house in Green Valley Ranch, mistakenly targeting innocent Senegalese immigrants after Bui used Apple's Find My feature to track his stolen phone to the wrong address. The August 2020 arson killed a family of five, including a toddler and infant. For months, detectives Neil Baker and Ernest Sandoval had no viable leads despite security footage showing three masked figures. Traditional methods -- cell tower data, geofence warrants, and hundreds of tips -- yielded nothing concrete. The breakthrough came when another detective suggested Google might have records of anyone searching the address beforehand. Police obtained a reverse keyword search warrant requesting all users who had searched variations of "5312 Truckee Street" in the 15 days before the fire. Google provided 61 matching devices. Cross-referencing with earlier cell tower data revealed the three suspects, who had collectively searched the address dozens of times, including floor plans on Zillow. Read more of this story at Slashdot.

  • Brembo's New Brakes Cut Particulate Emissions By 90 Percent
    by BeauHD on 22/05/2025 at 3:30 am

    An anonymous reader quotes a report from Ars Technica: As electric vehicles reduce car exhaust as a source of particulate emissions, people are increasingly focusing on other vehicular sources of pollution that won't go away with electrification. Tires are one of them, particularly as we grapple with overweight EVs with tire-shredding torque. And brakes are another -- even an EV with regenerative braking will occasionally need to use its friction brakes, after all. Over in Europe, the people responsible for writing regulations have taken this into consideration with the upcoming Euro 7 standard, which sets new limits on 10- and 2.5-micron particulate emissions on all new vehicles -- including EVs -- starting next year. And to help OEMs achieve that target, Brembo has developed a new brake and pad set called Greentell that it says cuts brake dust emissions by 90 percent, improving durability in the process. [...] Brembo investigated a range of solutions before settling on using laser metal deposition. Physical vapor deposition, as used as a durability coating for wristwatches and firearms, was ruled out due to cost. "So it can be used for some special application or some small pieces, but when you are speaking about 20 kilos of cast iron, PVD is not the right solution. LMD is a technology that [has been] available... [for] years, but [it hasn't yet been] applicable in a high volume application. So the goal is to find the best compromise between performance and process," [Fabiano Carminati, VP of disc technical development at Brembo] told me. Together with the reduction in brake dust, there's an 80 percent reduction in surface corrosion compared to conventional brakes, but they won't last forever. "The thickness of the layer that we apply is not so high -- we apply just 100-120 microns. That means that the disk is not a lifetime disk," he said. That said, Greentell brakes should need replacing less often, and while that's not entirely in Brembo's best financial interests, neither is not being able to offer its customers a Euro 7-compliant product. Read more of this story at Slashdot.

  • Phone Companies Failed To Warn Senators About Surveillance, Wyden Says
    by msmash on 22/05/2025 at 2:00 am

    Sen. Ron Wyden (D-Ore.) revealed in a new letter to Senate colleagues Wednesday that AT&T, Verizon and T-Mobile failed to create systems for notifying senators about government surveillance on Senate-issued devices -- despite a requirement to do so. From a report: Phone service providers are contractually obligated to inform senators when a law enforcement agency requests their records, thanks to protections enacted in 2020. But in an investigation, Wyden's staff found that none of the three major carriers had created a system to send those notifications. "My staff discovered that, alarmingly, these crucial notifications were not happening, likely in violation of the carriers' contracts with the [Senate Sergeant at Arms], leaving the Senate vulnerable to surveillance," Wyden said in the letter, obtained first by POLITICO, dated May 21. Wyden said that the companies all started providing notification after his office's investigation. But one carrier told Wyden's office it had previously turned over Senate data to law enforcement without notifying lawmakers, according to the letter. Read more of this story at Slashdot.

  • SEC Sues Crypto Startup Unicoin and Its Executives For Fraud
    by BeauHD on 22/05/2025 at 12:02 am

    The SEC on Wednesday said it has charged cryptocurrency startup Unicoin and three of its top executives for false and misleading statements that raised more than $100 million from thousands of investors. "We allege that Unicoin and its executives exploited thousands of investors with fictitious promises that its tokens, when issued, would be backed by real-world assets including an international portfolio of valuable real estate holdings," said Mark Cave, Associate Director in the SEC's Division of Enforcement. "But as we allege, the real estate assets were worth a mere fraction of what the company claimed, and the majority of the company's sales of rights certificates were illusory. Unicoin's most senior executives are alleged to have perpetuated the fraud, and today's action seeks accountability for their conduct." From the release: The SEC alleges that Unicoin broadly marketed rights certificates to the public through extensive promotional efforts, including advertisements in major airports, on thousands of New York City taxis, and on television and social media. Among other things, Unicoin and its executives are alleged to have convinced more than 5,000 investors to purchase rights certificates through false and misleading statements that portrayed them as investments in safe, stable, and profitable "next generation" crypto assets, including claims that: - Unicoin tokens underlying the rights certificates were "asset-backed" by billions of dollars of real estate and equity interests in pre-IPO companies, when Unicoin's assets were never worth more than a small fraction of that amount; - the company had sold more than $3 billion in rights certificates, when it raised no more than $110 million; and - the rights certificates and Unicoin tokens were "SEC-registered" or "U.S. registered" when they were not. According to the SEC's complaint, Unicoin and Konanykhin also violated the federal securities laws by engaging in unregistered offers and sales of rights certificates. Konanykhin offered and sold over 37.9 million of his rights certificates to offer better pricing and target investors the company had prohibited from participating in the offering to avoid jeopardizing its exemption to registration requirements, as alleged. Read more of this story at Slashdot.

  • Quebec To Impose French-Language Quotas On Streaming Giants
    by BeauHD on 21/05/2025 at 11:20 pm

    Quebec Culture Minister Mathieu Lacombe has introduced Bill 109, which would require streaming platforms like Netflix and Spotify to feature and prioritize French-language content. CBC.ca reports: Bill 109 has been in the works for over a year. It marks the first time that Quebec would set a "visibility quota" for French-language content on major streaming platforms such as Netflix, Disney and Spotify. [...] The legislation, titled An Act to affirm the cultural sovereignty of Quebec and to enact the Act respecting the discoverability of French-language cultural content in the digital environment, would apply to every digital platform that offers a service for watching videos or listening to music and audiobooks online. Those include Canadian platforms such as Illico, Crave and Tou.tv. It would amend the Quebec Charter of Human Rights and Freedoms to enshrine "the right to discoverability of and access to original French-language cultural content." If the bill is adopted, streaming platforms and television manufacturers would be forced to present interfaces for screening online videos in French by default. Those interfaces would need to provide access to platforms that offer original French-language cultural content based on the government's pending criteria. Financial penalties would be imposed on companies that don't follow the rules. If the business models of some companies prevent them from keeping to the letter of the proposed law, companies would be allowed to enter into an agreement with the Quebec government to set out "substitute measures" to fulfil Bill 109 obligations differently. "We don't want to exempt them. We're telling them, 'let's negotiate substitute measures,'" Lacombe told reporters. Read more of this story at Slashdot.

  • The Information: Microsoft Engineers Forced To Dig Their Own AI Graves
    by BeauHD on 21/05/2025 at 10:40 pm

    Longtime Slashdot reader theodp writes: In what reads a bit like a Sopranos plot, The Information suggests some of those in the recent batch of terminated Microsoft engineers may have in effect been forced to dig their own AI graves. The (paywalled) story begins: "Jeff Hulse, a Microsoft vice president who oversees roughly 400 software engineers, told the team in recent months to use the company's artificial intelligence chatbot, powered by OpenAI, to generate half the computer code they write, according to a person who heard the remarks. That would represent an increase from the 20% to 30% of code AI currently produces at the company, and shows how rapidly Microsoft is moving to incorporate such technology. Then on Tuesday, Microsoft laid off more than a dozen engineers on Hulse 's team as part of a broader layoff of 6,000 people across the company that appeared to hit engineers harder than other types of roles, this person said." The report comes as tech company CEOs have taken to boasting in earnings calls, tech conferences, and public statements that their AI is responsible for an ever-increasing share of the code written at their organizations. Microsoft's recent job cuts hit coders the hardest. So how much credence should one place on CEOs' claims of AI programming productivity gains -- which researchers have struggled to measure for 50+ years -- if engineers are forced to increase their use of AI, boosting the numbers their far-removed-from-programming CEOs are presenting to Wall Street? Read more of this story at Slashdot.

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