@argilo

Amateur radio operator (call sign VE3IRR), Esperanto speaker, computer security researcher, and hardware hacker.

 Leamington, Ontario
irrational.net/
Joined August 2008
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  • Followers983
172Media
This site has become a farce. I'm outta here. If you want to keep in touch, follow me on Mastodon. ✌️
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We are excited to announce that #GRCon23 will be held as an in-person event September 5-9 at @ASU in Tempe, AZ. Registration is currently open! gnuradio.org/grcon23 Want to present at this year’s conference? The Call for Participation is also open (abstracts due June 5).
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Gqrx 2.15.10 is out! 🎉 Lots of bug fixes and performance improvements, plus a few new features. Thanks to all the contributors who made this release possible! github.com/gqrx-sdr/gqrx/rel… #GNURadio #OpenSource #SDR
Screenshot of Gqrx 2.15.10 receiving cellular signals

ALT Screenshot of Gqrx 2.15.10 receiving cellular signals

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Save the Date! GNU Radio Conference 2023 (GRCon23) will take place September 5-9 in Tempe, AZ with live streaming available. Additional info & updates to follow on gnuradio.org. #grcon23
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Thanks @ericwastl for another great #AdventOfCode! ⭐ I had my best year yet, making it onto the global leaderboard twice and earning 21 points. 📈 adventofcode.com/
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Upcoming ARISS Contact with Maitland Air Cadet Association in Goderich, Ontario: Friday, December 16 - rac.ca/upcoming-ariss-contac…
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Attention #cybersecurity enthusiasts... We've just received some top secret intelligence: The dates for BSidesOttawa 2023 have been confirmed! Please mark your calendars for October 26th & 27th, 2023. We look forward to seeing you there!
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I have news for people who did the @BsidesOttawa CTF: I WAS THE ROBOT!!!!
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10 years! Check out the CTF if you’re attending. Hoping to see some familiar faces later today. :)
BSides Ottawa@BsidesOttawa28 Nov 2022
Happy 10th B-day BSidesOttawa! Feels like yesterday we were putting together the first BSidesOttawa. It’s been a long and amazing journey since those early days, and we have so much to be thankful for! BSidesOttawa: Nov 28th & 29th at Brookstreet Hotel. bsidesottawa.ca/attending-bs…
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Registration is now OPEN: visit bsidesottawa.ca/attending-bs… before they run out! First come, first serve! 🚨⏰ #BSidesOttawa2022
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I reached my stretch goal of opening 31 #Hacktoberfest2022 pull requests! 🎉 #GNURadio #OpenSource #SDR
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New blog post: Building challenges for the #GRCon22 CTF irrational.net/2022/10/04/bu… #GNURadio #OpenSource #SDR #CTF
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Even though the competition period for the #GRCon22 CTF has ended, most of the challenges are still up and playable at ctf-2022.gnuradio.org/. Have fun! #GNURadio #OpenSource #SDR #CTF
Screenshot of Gqrx receiving signals from a CTF challenge

ALT Screenshot of Gqrx receiving signals from a CTF challenge

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Polarization Modulation?! Codes hidden in the spectrum of HDF5 GUPPI files. Custom OFDM. And messages in the closed captions of NTSC video! This year's CTF really had variety! Checkout Daniel's write-up of four of the challenges for details.
Daniel Estévez@ea4gpz2 Oct 2022
New blog post: GRCon22 Capture The Flag. Write-up of the challenges I submitted and some of the challenges I solved in the @gnuradio conference CTF. (1/n)
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I've also included my solutions for the Never the same color track by @argilo. This had an NTSC signal. A few flags were in the audio channels, another in some of the video frames, and two more in the closed captions. I made my own Python thing to get the frames. (5/6)
The waterfall of the signal in this challenge. For those familiar with analog video, it is apparent that this is a video signal.

ALT The waterfall of the signal in this challenge. For those familiar with analog video, it is apparent that this is a video signal.

One of the frames of the video. There is the GRCon22 logo, argilo's amateur radio callsign, and a QR code. Unfortunately this QR code is a rickroll...

ALT One of the frames of the video. There is the GRCon22 logo, argilo's amateur radio callsign, and a QR code. Unfortunately this QR code is a rickroll...

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New blog post: GRCon22 Capture The Flag. Write-up of the challenges I submitted and some of the challenges I solved in the @gnuradio conference CTF. (1/n)
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The Capture the Flag signals challenge at #GRCon22 is going well and the score at the top is very close! There's still time to join, there are challenges for complete beginners all the way up to DSP wizards. ctf.gnuradio.org
A plot of the CTF score over the first three days. The second, third, and fourth teams have nearly identical scores.

ALT A plot of the CTF score over the first three days. The second, third, and fourth teams have nearly identical scores.

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It's not too late to sign up for the @gnuradio conference CTF, which runs until Thursday at 16:00 EDT (20:00 UTC). Get started here: ctf.gnuradio.org/ #GRCon22 #CTF #GNURadio #OpenSource #SDR
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The GRCon 2022 CTF is about to begin! Sharpen your GNU Radio skills while searching for secret messages ("flags") hidden in mysterious signals. Join us on-site in the Ohio room, or online in the GRCon 2022 Capture the Flag matrix room. flag{g00d_luck!} ctf.gnuradio.org
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To join the Capture the Flag challenge head over to ctf.gnuradio.org and then join the chat room #grcon22-ctf:gnuradio.org on Matrix.
A plot showing a spectrum with two signals present in it, they are varying in frequency to make it slightly tricky to receive. Clayton Smith is standing next to the plot.

ALT A plot showing a spectrum with two signals present in it, they are varying in frequency to make it slightly tricky to receive. Clayton Smith is standing next to the plot.

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