Author Archive

https://hackaday.com/2017/09/14/bluetooth-vulnerability-affects-all-major-os/ Turn off your Bluetooth! I checked that mine was turned off after reading this: Security researchers from Armis Labs recently published a whitepaper unveiling eight critical 0-day Bluetooth-related vulnerabilities, affecting Linux, Windows, Android and iOS operating systems. These vulnerabilities alone or combined can lead to privileged code execution on a target device. The only requirement is: →

As the popularity of IoT devices grow, it’s only natural that security holes in some of the systems will become apparent. IoT Devices May Be Susceptible to Replay Attacks with a Raspberry Pi and RTL-SDR Dongle andAttack Some Wireless Devices With A Raspberry Pi And An RTL-SDR articles tell that an easy way to make a →

http://www.edn.com/electronics-blogs/5g-waves/4458807/Five-technologies-for-building-5G?utm_content=buffer90279&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer 5G is widely considered a mobile technology that won’t be available until perhaps 2020 or 2021, and even then, not widely.  Cisco predicts that by 2021, a 5G connection will generate 4.7 times more traffic than the average 4G connection. 5G will be a quantum leap from today’s LTE-Advanced networks.  →

https://techcrunch.com/2017/09/12/apple-announces-the-iphone-8-and-iphone-8-plus/?ncid=rss&utm_source=tcfbpage&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook&sr_share=facebook Apple just unveiled the iPhone 8 and iPhone 8 Plus at its press event.  →

https://hackaday.com/2017/09/11/these-twenty-assistive-technologies-projects-won-1000-in-the-hackaday-prize/ This page introduces the winners of the Assistive Technologies projects. Take a look at many interesting open hardware projects. →

https://developers.redhat.com/blog/2017/08/31/on-link-modeling-network-emulation-and-its-impacts-on-applications/?sc_cid=7016000000127ECAAY In every packet-switched network, you will notice characteristics that are intrinsic to them and that varies depends on the communication channels being used. Such characteristics are bandwidth, delay (including jitter), packet loss, packet corruption and reordering. Linux has the tc queue discipline ‘netem’ for quite some time now. Netem is capable of emulating all →

Bitcoin is a worldwide cryptocurrency and digital payment system called the first decentralized digital currency. It was released as open-source software in 2009.The system is peer-to-peer, and transactions take place between users directly, without an intermediary.These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. On 1 August →

In my Antenna measurements with RF noise source posting I described how antenna measurements can be done with RF noise source, directional coupler and SDR radio (DVB-T stick). To do measurement we connect the noise source to the output of the coupler, the antenna to the input of the coupler and the RTL-SDR dongle to →

I did some antenna measurement with RTL-DSR with help of directional coupler. Before I realised I had directional coupler, I did some experimenting with antenna signal splitter. RF splitters are widely used in RF applications. The enable RF power to be split or combined within an environment where the characteristic impedance is maintained. There are →

Software-defined radio (SDR) is a radio communication system where components that have been traditionally implemented in hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead implemented by means of software on a personal computer or embedded system. Experimenting with software defined radio used to be expensive, but now it is cheap. Nowadays it is →