• TempestSDR: An SDR tool for Eavesdropping on Computer Screens via Unintentionally Radiated RF
    Thanks to reader 'flatflyfish' for submitting information on how to get Martin Marinov's TempestSDR up and running on a Windows system. If you didn't already know by definition "TEMPEST" refers to techniques used by some spy agencies to eavesdrop on electronic equipment via their unintentional radio emissions (as well as via sounds and vibrations). All electronics emit […]
  • Airspy Black Friday Deal – 15% off Airspy Mini/R2
    Airspy have just tweeted a Black Friday deal for their products sold on iTead Studio. Simply use the coupon "AIRSPYBLACK" when checking out. It looks like the coupon is giving 15% off the Airspy Mini and Airspy R2. No discounts yet for the Airspy HF+ or SpyVerters. #BlackFriday #Discount on a selection of Airspy products […]
  • Spectral Fusion with Sparrow-WiFi: SDR meets WiFi, Bluetooth, and drones in one new tool
    Thanks to Mike (ghostop14) for submitting another interesting article this time about his work with spectral fusion on the WiFi and Bluetooth bands. In the article Mike describes his new Sparrow-WiFi tool, which is a tool that allows you to visualize the WiFi and Bluetooth signal spaces all in one spectral display. The hardware consists of a WiFi […]
  • HF Reception with an EeePC and an RTL-SDR Blog V3 Running on a Raspberry Pi with SpyServer
    Over on YouTube user IW2DZX has uploaded a video showing him using an old EeePC 900 to receive HF with an RTL-SDR V3 running in direct sampling mode on a Raspberry Pi 3 which is running a SpyServer. An EeePC 900 is an old netbook that was released in 2008 which is lightweight, portable and was fairly cheap. Second […]
  • Tracking RS41-SGP weather balloons and reporting them to the APRS Network
    Over on his blog Daniel Estevez has created a post showing how an RTL-SDR can be used to receive, plot and forward RS41-SGP radiosonde data to the APRS-IS network. Radiosondes are the small payloads used on weather balloons. They transmit weather and positional telemetry data back to a base station at the meteorological agency. But depending on the frequency […]

RSS Radio for Everyone

  • Easy and cheap antenna weatherproofing picture guide
    Works for less than $1 total, total time 15 minutes, survives any weather including red alert hurricane level.ProblemEquipment is outdoors, therefore exposed to elements. Electricity and water do not mix.Buy quality tape from builders providers or commercial places, if parking lot got vans or trucks with name and numbers on the side, patrons' pants sport more than […]
  • Review: Nooelec Nano 3
    First RTL-SDR dongle made for on-the-go mobile use: tiny metal case, R820T2 chipset with TCXO, 2 year warranty, bundle with four OTG cables, heatsink and antenna to fit everything in your pocket.Got two review samples from Nooelec for testing for free, honest opinion below as always.Subscribe to Twitter feed @rtlsdr4everyone to get notified of updates.In the boxBrushed black […]
  • ADS-B Shootout: FlightAware vs Antenna Kit vs Jetvision
    Three antennas on windowsill, one week.Participating:FlightAware ADS-B antenna, yours for around $45, left black in image Antenna Kit, middle puny one, part of antenna package for $10,Jetvision ADS-B antenna, fat big white one on the right, $90 dollars or so at manufacturer website. Friend's loan.FlightAware antenna is my arbitrator for aeons, know what it will do, antenna kit […]
  • Fine tuning noise floor testing methodology
    A dongle's noise floor represents a value in decibels for a particular frequency and gain setting.Measuring the noise floor of any RTL-SDR dongle is beneficial for the following:- establishing whether any modding or attempted improvement resulted in the expected outcome,- comparing dongles as long as the same testing equipment and commands used.Comparisons are NOT recommended […]
  • Group ADS-B test: 19 dongles
    19 RTL-SDR dongle variations tested with identical Raspberry Pi 3 based ADS-B stations, sharing the same antenna and filtered preamp.DisclosurePost features my purchases and manufacturers' review samples, couldn't have done this comparison without support - many thanks!Links open in new tab, maker, main distributor, or Amazon affiliate links given to check at-door cost, do your research to save money.Images go […]

RSS Run my experiment on GENI

  • The spanning tree protocol
    In this experiment, we will see how broadcast storms can occur in a network with bridge loops (multiple Layer 2 paths between endpoints). Then, we will see how the spanning tree protocol creates a loop-free logical topology in a network with physical loops, so that a broadcast storm cannot occur.
  • Open Issues in Router Buffer Sizing
    In this experiment, we reproduce the results of Amogh Dhamdhere and Constantine Dovrolis. Open issues in router buffer sizing. SIGCOMM Comput. Commun. Rev., 36(1):87–92, January 2006. on the GENI testbed. Prior results in [2] had suggested that as long as the link carries many TCP flows, only
  • Visible Light as a Communication Medium
    In this experiment, you will learn how to use the VLC - visible light communication - devices on the WITest testbed, and how to capture and visualize the light levels measured at the receiver. It should take about 2 hours to run this experiment, but you will need to have
  • Using wireless testbeds to mimic a part of a community network
    In this experiment, we will set up a mesh network similar to a part of a live community network, and observe how packets are routed across multiple hops in this network. It should take about 120 minutes to run this experiment, but you will need to have reserved that time
  • Restless video bandits: Optimal SVC scheduling in wireless networks
    This is an experimental evaluation of the Buffer State Aware scheduling heuristic that we have developed for SVC video delivery in wireless networks. Buffer State Aware scheduling achieves good performance relative to Proportional Fairness and Best Channel scheduling policies, while avoiding the complexity associated with joint optimization of wireless resource

RSS Crazy Danish Hacker

RSS Blog – Hackaday

  • Precision Voltage Reference Source
    [barbouri] found a few old (vintage?) parts from the early ’80’s while rummaging through his parts bin, and quickly spun out a small PCB to build a 10.000 V reference using these old ICs. Throwing together a small number of parts, he was able to build a source which might be good enough to use […]
  • Bringing MATLAB to a Vacuum Near You
    The essence of hacking is modifying something to do a different function. Many of us learned as kids, though, that turning the family TV into an oscilloscope often got you into trouble. These days, TVs are flat and don’t have high voltage inside, but there’s always the family robot, often known as a Roomba. Besides […]
  • Dumb Box? Make it Really Smart!
    [Stephen Harrison]’s Really Smart Box is a great concept, it’s simultaneously a simple idea while at the same time being super clever. The Really Smart Box isn’t really a box; it’s a drop-in platform that can be made any size, intended to turn any dumb storage box into one that helps manage and track levels […]
  • Swarm of Servos Plays this Robotic Glockenspiel
    It’s the happiest sounding instrument in the marching band, and it’s got the best name to boot. It’s the glockenspiel, and if this robotic glockenspiel has anything to say about it, the days of human glockenspielists are numbered. In its present prototype form, [Averton Engineering]’s “Spielatron” looks a little like something from a carousel calliope or an animatronic pizza […]
  • Glue Gun Teardown Reveals Microcontroller Mystery
    [electrobob] got a Bosch GluePen cordless hot glue gun. The thing has some nice features — it heats up in fifteen seconds, and charges via USB, and is generally handy for those small and quick jobs that hot glue guns were made to perform. At first glance it seems like a huge improvement over the […]

RSS Gough's Tech Zone

  • Netflix Uses My VHS Cassette Images Without Permission
    Maybe you’re aware of Netflix, maybe you even have a subscription for their services. You might have also heard of or watched a series called Stranger Things, produced by Netflix. But did you know that Netflix have been selling a … Continue reading →
  • Teardown: Generic QC2.0 15W Charger (TCAU15U-050912)
    Owing to the growing market-share of Qualcomm devices sporting Quick Charge 2.0 and 3.0 capabilities, the market for such devices has grown substantially. As part of reviewing some power banks with QC-capabilities, it would not be possible to assess their … Continue reading →
  • Moments to Disaster: Hard Drive Failure & SMART Data
    While I was away on holiday, blissfully enjoying my time outdoors, I wasn’t aware that a disaster was brewing at home. I got a message from my brother that his machine had started making a clicking noise, and it was … Continue reading →
  • USB Connector Resistance: Another reason for slow phone/tablet charging
    It was back in 2014 when I first published about USB cable resistance as one reason why your phone or tablet might be charging slowly. At the time, quality cables with good gauge wires were hard to find, and many … Continue reading →
  • Event: BoM Space Weather Users Workshop (16 – 17 Nov 2017)
    Usually, I tend to make an effort to make a few postings throughout the weekends, but this weekend has been a little bit of an exception. That’s because on Thursday 16th and Friday 17th November, I attended the Bureau of … Continue reading →


  • FUNcube-1 celebrates its 4th birthday
    Today, November 21st 2017, marks the fourth birthday for FUNcube-1 (AO-73) in orbit. FUNcube-1 was launched at 07:10 UTC on November 21st 2013 and its first signals were received immediately after deployment over the Indian Ocean by amateurs in South … Continue reading →
  • RadFxSat (Fox-1B) Launched, Designated AMSAT-OSCAR 91 (AO-91)
    The Delta II rocket carrying RadFxSat (Fox-1B) launched at 09:47:36 UTC on November 18, 2017 from Vandenberg Air Force Base, California. Following a picture-perfect launch, RadFxSat was deployed at 11:09 UTC. Then the wait began. At 12:12 UTC, the AMSAT … Continue reading →
  • RadFxSat (Fox-1B) Telemetry Reception Challenge
    Get FoxTelem set up and ready to go on Saturday! The first amateur radio operator that successfully receives RadFxSat (Fox-1B) telemetry and uploads it to the AMSAT server will receive a commemorative 3D printed QSL card. RadFxSat is scheduled for … Continue reading →
  • Countdown to World Radiocommunication Conference 2019
    Bryan Rawlings, VE3QN, RAC Special Advisor, is in Geneva, Switzerland attending Preparatory Meetings for the 2019 World Radiocommunication Conference (WRC-19) until Friday, November 17. The current meetings are the fourth of a series of meetings which will continue until just … Continue reading →
  • 6th Staines Scouts receive FUNcube-1 message
    The Chertsey Radio Club got some good publicity for both amateur radio and the FUNcube-1 (AO-73) satellite in the Heathrow Villager newspaper published on November 4, 2017. Club members James Preece M0JFP, Ian Parbery 2E0IPP and Bob Conduit M6FLT along … Continue reading →

RSS Compass Security Blog

  • Write-up: BlackAlps Y-NOT-CTF
    The BlackAlps 2017 security conference took place this week in Yverdon-les-Bains: A small delegation of Compass Security was here to present a web application security workshop and also take part in the Y-NOT-CTF. You’ll find below a write-up of the challenges we were able to solve. Fun : Beautiful Alps This was probably the […]
  • 2017
    Recently our analysts have been spending increasing amounts of time on IoT security. More specifically looking at the Tensilica Xtensa microcontroller architecture, and even more specifically at the Mongoose OS embedded operating system. With some public (CVE-2017-7185), and some not yet disclosed advisories (watch this space for Dobin Rutishauser’s work), we are happy to announce that […]
  • BlackHat 2017 & DefCon 25
      This year three Compass analysts, Stephan Sekula, Dobin Rutishauser, and Philipp Promeuschel, attended the BlackHat and DefCon. Previous write-ups are also available from 2016, and 2015 Part 1 and Part 2 . Two anniversaries were celebrated – BlackHat 20 and DefCon 25. Predictably, a lot of new research was presented.  Compass Analysts had the opportunity to  attended different BlackHat […]

RSS 0xicf

  • ClearEnergy ransomware can destroy process automation logics in critical infrastructure, SCADA and industrial control systems.
    Schneider Electric, Allen-Bradley, General Electric (GE) and more vendors are vulnerable to ClearEnergy ransomware. Researchers at CRITIFENCE® Critical Infrastructure and SCADA/ICS Cyber Threats Research Group have demonstrated this week a new proof of concept ransomware attack aiming to erase (clear) the ladder logic diagram in Programmable Logic Controllers (PLCs). The ransomware a.k.a ClearEnergy affects a massive […]
  • Flaws in Samsung’s ‘Smart’ Home Let Hackers Unlock Doors and Set Off Fire Alarms
      A smoke detector that sends you a text alert when your house is on fire seems like a good idea. An internet-connected door lock with a PIN that can be programmed from your smartphone sounds convenient, too. But when a piece of malware can trigger that fire alarm at four in the morning or […]
  • Waze | Another way to track your moves
    Millions of drivers use Waze, a Google-owned navigation app, to find the best, fastest route from point A to point B. And according to a new study, all of those people run the risk of having their movements tracked by hackers. Researchers at the University of California-Santa Barbara recently discovered a Waze vulnerability that allowed […]

RSS Nick Whyte

  • Reverse Engineering a 433MHz Motorised Blind RF Protocol
    I’ve been doing a fair bit of DIY home automation hacking lately across many different devices - mostly interested in adding DIY homekit integrations. A couple of months ago, my dad purchased a bulk order of RAEX 433MHz RF motorised blinds to install around the house, replacing our existing manual roller blinds. Note: These blinds […]
  • 100 Warm Tunas 2016
    🔥💯 🔥💯 Last year I predicted the top 3 results in order in Triple J’s hottest 100. This year I’m back at it again, however, now with a webpage and a Spotify playlist. Results are collected, optimised, and processed multiple times per day. Instagram images tagged with #hottest100 and a few others are included for […]
  • Understanding and Tweaking some GPX data
    As a casual bike rider, I enjoy tracking my rides with Strava so I can take a look at how my ride went and how well I performed throughout. However, very rarely the Strava tracking application randomly crashes, or gets killed by iOS on my phone, during the ride. This means that the data was […]


  • New Tektronix Logo
    Tektronix, Inc. announced today that going forward they are using a newer, more modern logo. At first I thought “not another rebranding…,” but then I actually looked at the logos and the corresponding press-release. The logo looks a lot more modern and doesn’t really deviate from the original all too much. It’s easily recognizable to […]
  • Automated Forward Gain Measurement
    This article is going to take you into the world of automation. Using MATLAB and commercial off-the-shelf bits and pieces, this article will show how to measure the forward gain of a RF device. For a long time now I had a bunch of Mini Circuits portable test equipment bits and pieces sitting around. S […]
  • Thermal Design Basics | Practical Example
    Thermal design is one of those things engineers don’t really learn in school and hobbyists often don’t even think about. This article is going to show some basic math with a practical example. One of my portable police scanners has an external 6V jack. To use it in my car I used my standard linear […]

RSS fetch( ); decode( ); execute( );

  • Diving into FAT file system with a Hex Editor
    In this post, I'm going to explore a disk image which contains a FAT32 partition completely using a hex editor. This exploration provides an important insight on how FAT file system works. The disk image I'm using for this is a 100MB long file which can be download from here. SHA1 hash value of the […]
  • Creating a Raw Image File, Partition and Format It
    When playing with file system related stuff, especially for studying how they work at the low level with a hex editor, we are in need of many disk images. In such situations, instead of acquiring real disk images, it is possible to artificially create disk images on demand with any number of partitions we want […]
  • 3. Notes on Machine Learning: Basics of Neural Networks
    Neural Networks is an interesting branch in machine learning which attempts to mimic the functionality of neurons in human brain. A neural network consists of the input feature vector \(X\) to a node, the hypothesis function which is sometimes called the activation function running inside a node and finally the output of the function. Instead […]

RSS Genesys Guru Blog

  • Genesys Integration on The Wire (IOTW)
    Following on from a previous post on Genesys Management 2.0 here I’ve been doing some additional work on integrating Genesys environments with Elasticsearch. The result is what I call Genesys Integration on The Wire (IOTW).     Integration on The Wire (IOTW) is a technology which enables system level integration based on a “zero touch” […]
  • Genesys Management 2.0
    Hi – I’m back! Unfortunately, due to client confidentiality I’ve not been able to blog about Genesys work projects for a few years. Let’s change that .. This post is about something I have been looking at for several years in the form of a shelved project which gets events from Genesys components via the […]
  • 2016 Xmas Light show using Raspberry Pi Controller

RSS ZeroSec – Adventures In Information Security