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Robert Xiao
@
nneonneo
Vancouver, British Columbia
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198
Tweetovi
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117
Pratim
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2.185
Osobe koje vas prate
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Robert Xiao
@nneonneo
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16. sij |
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bytes.fromhex()/bytes().hex()
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Robert Xiao
@nneonneo
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14. sij |
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@playdotjs Wow, play.js is really cool. Full Node.js environment on iOS. Heck, it’s so complete that I got a functioning iOS torrent client in a few lines of code thanks to WebTorrent. pic.twitter.com/cuo2CVikpL
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Robert Xiao
@nneonneo
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17. pro |
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In a recent CTF a teammate remarked that they were avoiding an online tool that was obviously written by a competing CTF team...
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Robert Xiao
@nneonneo
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17. pro |
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haven’t done anything worse than taboo, but definitely done everything above that (even had an energy drink that one time at SECCON then decided I was never going to use coffee or Red Bull ever again)
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Robert Xiao
@nneonneo
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17. pro |
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begging for hints- guilty; guessing flags- yep, when we have most of a flag (e.g. AI challenge); abusing clusters- yup, we’re a uni team after all; renting VPS to brute- yup, renting nearby AWS for lower latency.
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Zach Wade
@zwad3
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11. pro |
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When you get a flag with 20 seconds left
@RealWorldCTF pic.twitter.com/KY327Tby0C
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Robert Xiao
@nneonneo
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9. pro |
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I had an amazing two days in Beijing playing @RealWorldCTF 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 #chi2020, so I’ll be going to Hawaii :) twitter.com/hankein95/stat…
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Robert Xiao
@nneonneo
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27. lis |
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Tree Style Tab extension on Firefox is really the best way to manage tabs. I have never switched to Chrome partly because I’d have to give that up.
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Robert Xiao
@nneonneo
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3. lis |
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🚩=277777788888989
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Robert Xiao
@nneonneo
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28. ruj |
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Sounds like your browser developer needs to learn about recursion
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Robert Xiao
@nneonneo
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27. ruj |
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Twitter itself seems to have problems with the concept of recursion ¯\_(ツ)_/¯
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Robert Xiao
@nneonneo
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27. ruj |
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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. twitter.com/nneonneo/statu…
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Robert Xiao
@nneonneo
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24. ruj |
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Just published my writeup for CPU Adventure at DSCTF, wherein me, @zwad3, @thebluepichu and @jay_f0xtr0t reverse engineered a program written for a completely unknown, custom CPU with no access to the CPU, emulator or any documentation: robertxiao.ca/hacking/dsctf-…
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Robert Xiao
@nneonneo
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20. ruj |
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This means that me, with my actual 8-core laptop, clocked 28 seconds while they, with a 32-core not-laptop, clocked 1:40. I should clearly start a company and claim I’ve broken RSA - my algorithm is 10x faster than theirs! 🤣🤣🤣
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Robert Xiao
@nneonneo
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20. ruj |
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Oh, it gets worse. I finally watched their video. They’re not running the factoring on a laptop - they’re clearly SSHed into a 32-core Linux box, and it takes them 50 seconds per key.
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Robert Xiao
@nneonneo
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20. ruj |
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For 512, they quite disingenuously say 5 hours using "standard computing"; I initially thought they meant also using a laptop (which would be an advance over SotA), but now it's pretty clear they meant renting cloud compute. Factoring 512-bit was demo'd in 2015 in 4 hours on EC2.
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Robert Xiao
@nneonneo
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20. ruj |
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Using YAFU 1.34.3 and GMP-ECM 7.0.4, I just factored two 256-bit RSA keys on my 2019 MBP (laptop) in a total of 28 seconds - completely smoking Crown Sterling's claim. And YAFU is from 2015 - almost 4 years old...
pastebin.com/VYXyVfXT for the full YAFU log.
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Robert Xiao
@nneonneo
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19. kol |
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I’ve have basically never had coffee (outside of trying the stuff and deciding I hate it). Ditto for energy drinks and even Coke. I used to be able to pull all-nighters pretty readily without those things.
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Robert Xiao
@nneonneo
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19. kol |
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Seems fixed now. Thanks again for the fun game & good luck to everyone playing!
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Robert Xiao
@nneonneo
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18. kol |
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Ah, I think I was motivated by seeing that you were already on 12, so I had to work fast to catch up XD
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