Robert Xiao

@nneonneo

Assistant Professor at ; CTF player with PPP ; electronics, hardware, software, HCI, security

Vancouver, British Columbia
Joined February 2009
Born 1989

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  1. Pinned Tweet
    7 May 2018

    Finally, I can answer the big question: I am proud to announce that I will be joining as an Assistant Professor starting Winter 2019!

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  2. Retweeted
    10 Dec 2019

    When you get a flag with 20 seconds left

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  3. 9 Dec 2019

    I had an amazing two days in Beijing playing with PPP. A lot of incredibly interesting and fun challenges - looking forward to next year! And, in other great news, I just found out I had a paper accepted to , so I’ll be going to Hawaii :)

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  4. 27 Sep 2019

    When you finish a PhD in computer science, they take you to a special room and explain that you must never use recursion in real life. Its only purpose is to make programming hard for undergrads.

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  5. 24 Sep 2019

    Just published my writeup for CPU Adventure at DSCTF, wherein me, , and reverse engineered a program written for a completely unknown, custom CPU with no access to the CPU, emulator or any documentation:

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  6. 18 Aug 2019

    Damn, I think I’m getting old. I’m finally at the age where my effectiveness drops off a cliff after 4-5am or so. Guess that means I can’t pull all-nighters any more :(

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  7. 11 Aug 2019

    Truly, a team effort from everyone here at !

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  8. Retweeted
    29 Jun 2019

    Congrats on taking down the Pwny Race challenge first. After I get some other work done I'll have to see if I can come back and finish this. I had a good path forward, but didn't finish it before he took down the race.

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  9. 25 Jun 2019

    I’m excited to participate in this community pwnable race - come out and watch us hack binaries live!

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  10. 14 May 2019

    And of course congrats to for taking first place in , I knew you guys had it in you

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  11. 14 May 2019

    So much stuff happened this last week - a successful in Glasgow, (Maple Bacon takes 47th - a great result for our first time!), and the annual faculty retreat - that I’ve entirely forgotten to actually tweet about any of it

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  12. 13 Feb 2019

    Proud to announce that my thesis, “On-World Computing”, won the SIGCHI Outstanding Dissertation Award. I will be going to Glasgow to present it!

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  13. 3 Jan 2019

    Officially starting as an Assistant Professor here at ! – at ICICS (CICSR) building

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  14. 22 Sep 2018

    I knew Saskatchewan winters were long and cold, but I never thought they’d start in mid-September!!

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  15. 28 Aug 2018

    Samsung CTF: 4th of ~50 (individual contest), got a little special prize out of it. Flare-On: second finisher. All-in-all not a terrible way to spend a weekend in Korea :)

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  16. 22 Aug 2018

    My PhD has been certified, so it’s official - I’m now Dr. Robert Xiao!

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  17. 19 Aug 2018

    Code's online at if anyone is curious 😄

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  18. 19 Aug 2018

    That same result if I *don't* do SOCKS tricks: (And yes, I'm aware the canonical solution is "get a rooted Android phone", but seeing as I don't have a functioning one anymore, this iPhone hack will have to do).

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  19. 19 Aug 2018

    Life hack: I cut off my FIOS because I'm leaving soon, so I'm tethering to my iPhone. To get unlimited tethering speeds, I built a very quick & dirty SOCKS proxy app which forwards all my connections so they appear to come from the phone. Works great! 🎉🎉

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  20. 18 Aug 2018

    For DEF CON 2018, we built a bit of assembly code that prints out shellcode in 8 different architectures: AMD64, Clemency, PDP-1, LGP-30, and several others. Check out how we did it:

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  21. 12 Aug 2018

    This past weekend I was in Vegas playing DEFCON CTF, and just this morning I flew to lovely Vancouver to give a talk at SIGGRAPH 2018. It’s been a busy but fun 72 hours!

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