Skip to content
I T S S
  • Welcome
  • Hardware
  • Internet
  • Networking
  • Security
  • Data Recovery
  • Support
  • Contact
  • Webmail

A Nice Little Cryptography Primer

By itss | 28/06/2021
0 Comment

Pun Intended.

Category: Technology
Post navigation
← pfSense / Wireguard / Bad Code / Close Call Why Quake3 was so fast : Fast Inverse Square Root →

Recent Posts

  • Hardware Exploits?
  • Why Quake3 was so fast : Fast Inverse Square Root
  • A Nice Little Cryptography Primer
  • pfSense / Wireguard / Bad Code / Close Call
  • Apple Continues Its Trip To The Dark Side With The Release of MacOS 17 (Big Sur)

Slashdot

News for nerds

  • Python Blood Could Hold the Secret To Healthy Weight Loss
    by BeauHD on 03/04/2026 at 11:00 am

    Longtime Slashdot reader fahrbot-bot writes: CU Boulder researchers are reporting that they have discovered an appetite-suppressing compound in python blood that helps the snakes consume enormous meals and go months without eating yet remain metabolically healthy. The findings were published in the journal Natural Metabolism on March 19, 2026. Pythons can grow as big as a telephone pole, swallow an antelope whole, and go months or even years without eating -- all while maintaining a healthy heart and plenty of muscle mass. In the hours after they eat, research has shown, their heart expands 25% and their metabolism speeds up 4,000-fold to help them digest their meal. The team measured blood samples from ball pythons and Burmese pythons, fed once every 28 days, immediately after they ate a meal. In all, they found 208 metabolites that increased significantly after the pythons ate. One molecule, called para-tyramine-O-sulfate (pTOS) soared 1,000-fold. Further studies, done with Baylor University researchers, showed that when they gave high doses of pTOS to obese or lean mice, it acted on the hypothalamus, the appetite center of the brain, prompting weight loss without causing gastrointestinal problems, muscle loss or declines in energy. The study found that pTOS, which is produced by the snake's gut bacteria, is not present in mice naturally. It is present in human urine at low levels and does increase somewhat after a meal. But because most research is done in mice or rats, pTOS has been overlooked. "We've basically discovered an appetite suppressant that works in mice without some of the side-effects that GLP-1 drugs have," said senior author Leslie Leinwand, a distinguished professor of Molecular, Cellular and Developmental Biology who has been studying pythons in her lab for two decades. Drugs like Ozempic and Wegovy act on the hormone glucagon-like petide-1 (GLP-1). Read more of this story at Slashdot.

  • Renewables Reached Nearly 50% of Global Electricity Capacity Last Year
    by BeauHD on 03/04/2026 at 7:00 am

    Renewables made up nearly half of global installed electricity capacity by the end of 2025, "accounting for 85.6% of global capacity expansion," reports the Register, citing the International Renewable Energy Agency's (IRENA) 2026 Renewable Capacity Statistics report. "Per IRENA's data, that aforementioned 85.6 percent share of new power capacity additions was actually a decrease from 2024, when renewables were about 92 percent of global capacity additions. Yes, the share of total installed power capacity in 2025 rose again, but non-renewable capacity additions also rebounded sharply last year." From the report: Solar, in turn, was the dominant renewable technology, accounting for nearly three-quarters of last year's renewable capacity additions. Those additions totaled 692 GW in 2025, lifting installed renewable capacity by a record 15.5 percent year over year, IRENA noted. By the end of last year, renewables accounted for 49.4 percent of global installed electricity capacity, while variable renewable sources such as solar and wind represented roughly 35 percent of total capacity. For reference, it was only in 2023 that renewable energy sources crossed the threshold of generating 30 percent of the world's electricity. Read more of this story at Slashdot.

  • EPA Flags Microplastics, Pharmaceuticals As Contaminants In Drinking Water
    by BeauHD on 03/04/2026 at 3:30 am

    An anonymous reader quotes a report from NPR: Responding to public health concerns about microplastics and pharmaceuticals in the nation's drinking water, the Trump administration for the first time has placed them on a draft list of contaminants maintained by the Environmental Protection Agency. The EPA announced the move Thursday, touting it as a "historic step" for the Make America Healthy Again, or MAHA, movement, which often raises concerns about toxic chemicals and plastic pollution in our food and environment. Also Thursday, the Department of Health and Human Services announced a $144 million initiative, called STOMP, to develop tools to measure and monitor microplastics in drinking water and in a later stage, to remove them. The Safe Drinking Water Act requires the EPA to publish an updated version of its Contaminant Candidate List every five years. This is the sixth iteration of the list. Microplastics and pharmaceuticals appear in the draft of the upcoming list, alongside per- and polyfluoroalkyl substances, or PFAS, and dozens of other chemicals and microbes. Their inclusion on the list gives local regulators a tool to evaluate risks in their water supply, the EPA says, and it can set the stage for more research and regulatory action -- but doesn't actually guarantee that will happen. Read more of this story at Slashdot.

  • Mount Everest Climbers 'Poisoned' By Guides In Insurance Fraud Scheme
    by BeauHD on 02/04/2026 at 11:00 pm

    schwit1 shares a report from the Kathmandu Post: In Nepal, helicopter rescue on high altitude is, by any measure, a genuine lifesaving operation. At high altitude, where oxygen thins and weather changes without warning, the ability to airlift a stricken trekker to Kathmandu within hours has saved countless lives. But threaded through that legitimate system, exploiting its urgency, its opacity, and its distance from oversight, is one of the most sophisticated insurance fraud networks in the world. Nepal's fake rescue scam is not new. The Kathmandu Post first exposed it in 2018. Months later, the government convened a fact-finding committee, produced a 700-page report, and announced reforms. In February 2019, The Kathmandu Post published a long investigative report. Last year, Nepal Police's Central Investigation Bureau reopened the file, and what they found is that the fraud did not stop -- instead it was growing. The mechanics of the fake rescue racket are straightforward: stage a medical emergency, call in a helicopter, check a tourist into a hospital, and file an insurance claim that bears little resemblance to what actually happened. But the sophistication lies in how each link in the chain is compensated, and how difficult it is for a foreign insurer -- operating from Australia and the United Kingdom -- to verify events that occurred at 3,000 metres in a remote Himalayan valley. The CIB investigation identifies two primary methods for manufacturing an "emergency." The first involves tourists who simply don't want to walk back. After completing a demanding trek -- an Everest Base Camp trek, for instance, can take up to two weeks on foot -- guides offer an alternative: pretend to be sick, and a helicopter will come. The guide handles the rest. The second method is more troubling. At altitudes above 3,000 meters, mild symptoms of altitude sickness are common. Blood oxygen saturation can drop, hands and feet tingle, headaches develop. In most cases, rest, hydration or a gradual descent is all that is needed. But guides and hotel staff, according to the CIB investigation, have been trained to terrify trekkers at precisely this moment. They tell them they are at risk of dying, that only immediate evacuation will save them. In some cases, investigators found that Diamox (Acetazolamide) tablets, used to prevent altitude sickness, were administered alongside excessive water intake to induce the very symptoms that would justify a rescue call. In at least one case cited in the investigation, baking powder was mixed into food to make tourists physically unwell. Once a "rescue" is called, the financial choreography begins. A single helicopter carries multiple passengers. But separate, full-price invoices are submitted to each passenger's insurance company, as if each had their own dedicated flight. A $4,000 charter becomes a $12,000 claim. Fake flight manifests and load sheets are fabricated. At the hospital, medical officers prepare discharge summaries using the digital signatures of senior doctors who were never involved in the case. In some cases, these are done without those doctors' knowledge. Fake admission records are created for tourists who were, in some documented instances, drinking beer in the hospital cafeteria at the time they were supposedly receiving treatment. In one case, an office assistant at Shreedhi Hospital admitted that he had provided his own X-ray report taken about a year ago at a different hospital, to be used as a case for treatment of foreign trekkers to claim insurance. The commission structure that holds the network together was described in detail during police interrogations. Hospitals pay 20 to 25 percent of the insurance payment to trekking companies and a further 20 to 25 percent to helicopter rescue operators in exchange for patient referrals. Trekking guides and their companies benefit from inflated invoices. In some cases, tourists themselves are offered cash incentives to participate. Read more of this story at Slashdot.

  • OpenAI Acquires Popular Tech-Industry Talk Show TBPN
    by BeauHD on 02/04/2026 at 10:00 pm

    OpenAI is acquiring tech news podcast TBPN, a fast-growing daily show hosted by John Coogan and Jordi Hays. OpenAI says TBPN will keep its editorial independence, even though the acquisition is widely viewed as part of a broader effort to influence public discourse around AI. CNBC reports: In the announcement, OpenAI CEO of AGI Deployment Fidji Simo wrote that their mission of bringing artificial general intelligence comes with a responsibility to have a space for "constructive conversation about the changes AI creates." Altman has appeared on TBPN multiple times and is a frequent presence across media and podcasts, even hitting NBC's "Tonight Show Starring Jimmy Fallon" in December. The announcement says TBPN will maintain editorial independence and continue to choose its own guests. "TBPN is my favorite tech show. We want them to keep that going and for them to do what they do so well," Altman wrote in a post on X. "I don't expect them to go any easier on us, am sure I'll do my part to help enable that with occasional stupid decisions." OpenAI did not disclose the terms of the deal but said TBPN will be housed within its strategy organization. "While we've been critical of the industry at times, after getting to know Sam and the OpenAI team, what stood out most was their openness to feedback and commitment to getting this right," wrote Hays in a statement. "Moving from commentary to real impact in how this technology is distributed and understood globally is incredibly important to us." Read more of this story at Slashdot.

  • Amazon Imposes 3.5% Fuel Surcharge For Many Online Merchants
    by BeauHD on 02/04/2026 at 9:00 pm

    An anonymous reader quotes a report from Bloomberg: Amazon will start charging sellers who use its shipping services a 3.5% "fuel and logistics" surcharge later this month, joining the ranks of shipping companies raising prices as the war in Iran pushes oil prices higher. The fees take effect on April 17 for customers of the company's Fulfillment by Amazon service -- which is used by many of the independent sellers who list their products on Amazon's retail sites -- in the US and Canada. Items shipped by Amazon on behalf of merchants who sell on their own sites or at other retailers will carry the surcharge beginning May 2. "Elevated costs in fuel and logistics have increased the cost of operating across the industry," Ashley Vanicek, an Amazon spokesperson, said on Thursday. "We have absorbed these increases so far, but similar to other major carriers, when costs remain elevated we implement temporary surcharges to partially recover these costs." Vanicek notes that the fee will apply to the sum Amazon charges to ship an item, not the product's sale price. Last month, USPS announced that it would impose its first-ever fuel surcharge on packages. Read more of this story at Slashdot.

Archives

  • September 2022
  • November 2021
  • June 2021
  • March 2021
  • November 2020
  • October 2020
  • September 2020
  • February 2020
  • January 2020
  • October 2019
  • August 2018
  • July 2018
  • April 2018
  • February 2018
  • January 2018
  • December 2017
  • October 2017
  • September 2017
  • August 2016
  • July 2016
  • March 2016
  • February 2016
  • August 2015
  • May 2015

Categories

  • Innovation
  • Security
  • Software
  • Technology

Tags

backdoor cisco coding json laziness patterns public information announcement security vulnerability
© 2017 IT Sales & Services Ltd
Quality IT solutions in Tanzania since 2010
Iconic One Theme | Powered by Wordpress