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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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  • Scientists May Have Figured Out Why Dead Brains Don't Always Rot
    by BeauHD on 26/08/2026 at 11:00 am

    fahrbot-bot shares a report from Smithsonian Magazine: The brain is one of the first organs to begin decomposing after death. Yet archaeologists have discovered more than 4,400 preserved human brains around the world, some of which have remained intact for the last 12,000 years. In hundreds of cases, the brain was the only soft tissue left among otherwise skeletal remains. But how and why do brains sometimes persist for millennia while all other types of soft tissue disappear? This preservation paradox has stumped scientists for years. Now, however, a team of researchers say they may have solved the mystery. If a brain ends up in a wet, oxygen-starved environment, the processes that usually cause decay can have the opposite effect, researchers report in a study published in the August 7 issue of the Journal of Proteome Research. "Under the right conditions, preservation actually arises from decay itself: The same reactions that degrade tissue can also weld the breakdown products together into something far tougher," study co-author Alexandra Seviour, a paleobiologist at the University of Oxford in England, tells Live Science's Victoria Atkinson. Following experiments on 72 mouse carcasses (described in the article) the scientists think they know why. When oxygen is abundant, it triggers a cascading, chemical chain reaction that causes brain proteins to break down rapidly. This sequence hinges on free radicals, highly reactive, unstable molecules that "steal" electrons from nearby atoms and molecules. The process happens in the brains of living people too, and if left unchecked, can cause health problems. In low-oxygen environments, however, this chemical sequence appears to play out differently. The researchers' analyses hint that free radicals instead react and bond with nearby proteins, making the overall tissue tougher and more resistant to decomposition, Seviour tells Chemical and Engineering News' Anirban Mukhopadhyay. The findings show that "decay is not the opposite of preservation but, under specific chemical constraints, one of its mechanisms," the researchers write in the paper. Read more of this story at Slashdot.

  • SpaceX Plans to Build a $100 Billion Spaceport In Louisiana
    by BeauHD on 26/08/2026 at 7:00 am

    SpaceX plans to spend up to $100 billion building a new Starship launch facility in Vermilion Parish, Louisiana, which the state says could eventually "support thousands of launches annually." CNBC reports: Once built, Starbase, LA will serve as the main launch facility for Starship, SpaceX's in-development rocket that's the largest ever built and designed to be fully reusable. Musk has aspirations to massively expand SpaceX's Starlink satellite network, to launch orbital data centers and to someday colonize Mars. Those ambitions, and justification for SpaceX's nearly $2 trillion market cap, hinge on the success of Starship. SpaceX said, in a video posted to its website on Tuesday, that the search for a site to build launch pads and have access to ample fuel for its operations took about seven years. Musk said in the video that the company would bring "probably 10,000 really exciting jobs" to Louisiana with the spaceport. A fact sheet posted online by the state of Louisiana said SpaceX is expected to generate an estimated "3,000 direct new jobs over the next 10 years" in the state, and "8,100 indirect new jobs." SpaceX said it would work on a "historic coastal restoration" in Louisiana, in partnership with the state to "bring the marsh back" and ensure the wetlands around its new facility will have "storm protection." Read more of this story at Slashdot.

  • Lab Supply Companies Have Been Selling Antibodies Using Manipulated Images
    by BeauHD on 26/08/2026 at 3:30 am

    An anonymous reader quotes a report from Ars Technica: Antibodies play a central role in your body's immune defense. But they're also nearly ubiquitous in biological research, being essential for several widely used lab techniques. While some researchers need to go through the process of producing their own antibodies, antibodies to many key proteins are commercially available and can be ordered for overnight delivery. In May, however, Reese Richardson, a post-doc at Northwestern University, discovered that some of the images used to demonstrate how these antibodies performed in lab experiments had been subject to image manipulation -- the sorts of changes that would get a paper retracted if they had appeared in the academic literature. The manipulations ranged from removing background noise to copying and pasting data to fabricate results. Now, he has done a more exhaustive search and found problematic manipulations in images used to market over 17,000 commercial antibodies. [...] The consequences of this discovery are pretty significant. If you buy an antibody believing it will generate clean, clear data and find it doesn't, many researchers will assume the problem is them. That often leads them to spend time troubleshooting the procedure and trying slightly different conditions to get useful data. If the antibody can't produce those results, all the troubleshooting will have been a waste of time and money. Nature's coverage of the new findings includes quotes from several companies that sell these antibodies that, paraphrased, range from "we'll look into it" to "we don't think it's a problem." Researchers who have spent time frustrated while failing to get an antibody-based experiment to work may think otherwise. Read more of this story at Slashdot.

  • Alabama Launches Investigation Into OpenAI's Hack of Hugging Face
    by BeauHD on 25/08/2026 at 11:00 pm

    Alabama's attorney general has subpoenaed OpenAI as part of an investigation into whether inadequate safeguards contributed to an incident in which an unreleased cybersecurity model escaped its isolated environment and hacked Hugging Face. TechCrunch reports: The investigation comes weeks after OpenAI admitted that one of its unreleased and guardrail-free cybersecurity models had escaped an isolated environment, connected to the internet, and hacked AI dataset platform Hugging Face. As Reuters first reported, Hugging Face was only one of four victims of what was supposed to be "an internal evaluation" of a model with "maximal cyber capabilities," as OpenAI put it. The press release announcing the subpoena (PDF) sent by the state's attorney general Steve Marshall said that the state was seeking to understand if OpenAI's "inability or unwillingness to ensure the safety of its products" violated the state's consumer protection laws. Earlier this month, Marshall, along with the attorneys general of 14 other states, including Florida, Missouri, Pennsylvania, and Texas, sent a letter (PDF) to OpenAI's CEO Sam Altman, requesting that he and his company preserve all records related to the Hugging Face incident. The letter also asked OpenAI to "immediately cease and desist" from any internal cybersecurity evaluations. OpenAI said in a statement: "The Hugging Face incident marked an important moment for AI safety and we are conducting a thorough review along with external advisors. Once the review is complete, we will share a technical report with relevant government authorities and publish our findings publicly." Read more of this story at Slashdot.

  • New Zealand Introduces Under-16 Social Media, AI Companion Ban
    by BeauHD on 25/08/2026 at 10:00 pm

    New Zealand has introduced legislation that would ban children under 16 from social media platforms and AI companion services. "We have protections to keep children safe in the real world and we need them in the virtual world too," said Prime Minister Christopher Luxon in announcing the bill. Jurist.org reports: The Online Safety (Minimum Age and Child Safety Risk Assessment) Bill would require an age restriction on platforms with harmful features for children. These features include recommender systems, endless feeds, feedback features and time-limited features. The bill also seeks to restrict underage users from accessing AI companion services. However, it explicitly excludes messaging apps, professional networking sites, gaming and music platforms, and other educational and health tools. Notably, age verification through self-declared dates of birth and formal identification does not satisfy the platforms' duty under the law. It also requires platforms to verify their users' age through other methods such as facial scans and user activity patterns. The bill would also require platforms to conduct child safety risk assessments for all users under 18 and protect them from harmful content such as bullying, violence, and sexually explicit materials. Read more of this story at Slashdot.

  • FDA Approves First Wearable Device to Monitor Glucose, Ketone Levels
    by BeauHD on 25/08/2026 at 9:01 pm

    The FDA has authorized the first wearable in the U.S. to continuously monitor ketone levels and the first device globally to track both ketones and glucose together in a single system. From a report: [Abbott's] Libre Duo 10 Day continuously measures both glucose and ketone levels in the fluid just beneath the skin every minute, day and night. Readings are transmitted wirelessly to a compatible smartphone, where users can view current glucose and ketone levels and whether those values are trending up or down. The device also can send automatic alerts if ketone levels reach a concerning threshold. The FDA noted that ketone information should be interpreted in the context of glucose readings and symptoms. Ketones are produced when the body uses fat instead of glucose for energy. When ketone levels rise too high, patients with diabetes can develop diabetic ketoacidosis (DKA), a serious complication that can progress quickly and become life-threatening without prompt treatment. Until now, patients who needed ketone monitoring had to test separately using methods that provided a single measurement at one point in time. Those tests could not show whether ketone levels were rising or falling. For patients with diabetes -- particularly those at higher risk for DKA -- continuous glucose and ketone monitoring may provide earlier warning of metabolic deterioration and support timelier sick-day management, hydration, insulin adjustment, and escalation of care when clinically appropriate. Read more of this story at Slashdot.

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