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Category: Telecommunications Engineering

BGP leaks and cryptocurrencies

Over the few last hours, a dozen news stories have broken about how an attacker attempted (and perhaps managed) to steal cryptocurrencies using a BGP leak. CC BY 2.0 image by elhombredenegro What is BGP? The Internet is composed of routes. For our DNS resolver 1.1.1.1 , we tell the world that all the IPs in the range 1.1.1.0 to 1.1.1.255 can be accessed at any Cloudflare PoP. For the people who do not have a direct link to our…

A Carbon Neutral North America

Photo by Karsten Würth (@inf1783) / Unsplash Cloudflare’s mission is to help build a better Internet. While working toward our goals, we want to make sure our processes are conducted in a sustainable manner. In an effort to do so, we’ve reduced Cloudflare’s environmental impact by contracting to purchase regional renewable energy certificates, or “RECs,” to match 100% of the electricity used in our North American data centers as well as our U.S. offices. Cloudflare now has servers in 154…

Creative Linux routing to preserve client IP addresses in L7 proxies

In previous blog post we discussed how we use the TPROXY iptables module to power Cloudflare Spectrum. With TPROXY we solved a major technical issue on the server side, and we thought we might find another use for it on the client side of our product. This is Addressograph. Source Wikipedia When building an application level proxy, the first consideration is always about retaining real client source IP addresses. Some protocols make it easy, e.g. HTTP has a defined X-Forwarded-For…

Two robots are better than one for NIST’s 5G antenna measurement research

NIST’s new Large Antenna Positioning System (LAPS) uses two robotic arms to measure and test antennas for applications such as advanced communications systems. Credit: Burrus/NIST Researchers at the National Institute of Standards and Technology (NIST) continue to pioneer new antenna measurement methods, this time for future 5G wireless communications systems. NIST’s new Large Antenna Positioning System (LAPS) has two robotic arms designed to position “smart” or adaptable antennas, which can be mounted on base stations that handle signals to and…

A Tour of Duty at the U.S. Digital Service

Every month, Square Engineers give lightning talks internally. We’re excited to share some of our favorites! Zach talks about working with the USDS, some of their core values, and his work on login.gov. In learning about the values of the USDS, we can see how the government aims to better serve people in the future as we become more reliant upon the internet and digital services. Source link…

Turning injectable medicines into inhalable treatments with the help of smart phone components

Friend and colleagues are using devices found in cell phones to atomize very thick liquids. Credit: University of California – San Diego Imagine if all childhood vaccines could get delivered with an inhaler rather than shots; or wiping away tuberculosis bacteria in a patient’s lungs with an inhaler; or disinfecting a hospital room thoroughly with a diffuser. These are the goals of a research team led by Professor James Friend in the Department of Mechanical and Aerospace Engineering at the…

Sensors in public spaces can help create cities that are both smart and sociable

Overflowing bins are one way to spoil the amenity of public space, but sensors can now alert councils when bins need emptying. Credit: Wikimedia How are smart cities meant to meet citizen needs? Big data from a network of sensors can give managers and planners a real-time, big-picture overview of traffic flows, public transport patronage, and water and power use. However, the needs of people in the city must be met at both the meta and micro levels. To do…

MU researcher studies impact of interruptions on nurses’ work

Jung Hyup Kim (rear), an assistant professor of Industrial and Manufacturing Systems Engineering at the University of Missouri, and his team of students — including Ph.D. student Wenbin Guo, recently traveled to the Mayo Clinic in Rochester, Minn., to study just how these kinds of brief interruptions affected nurses in their emergency department. Photo by Amy Parris. Think about how many times a person is interrupted during their workday. Someone asks a question, a phone call comes during another task,…

Cloudflare Argo Tunnel with Rust+Raspberry Pi

Yesterday Cloudflare launched Argo Tunnel. In the words of the product team: Argo Tunnel exposes applications running on your local web server, on any network with an Internet connection, without adding DNS records or configuring a firewall or router. It just works. Once I grokked this, the first thing that came to mind was that I could actually use one of my Raspberry Pi’s sitting around to serve a website, without: A flaky DDNS running on my router Exposing my…

Electrodes on the face and jaw pick up otherwise undetectable neuromuscular signals triggered by internal verbalizations — ScienceDaily

MIT researchers have developed a computer interface that can transcribe words that the user verbalizes internally but does not actually speak aloud. The system consists of a wearable device and an associated computing system. Electrodes in the device pick up neuromuscular signals in the jaw and face that are triggered by internal verbalizations — saying words “in your head” — but are undetectable to the human eye. The signals are fed to a machine-learning system that has been trained to…