Challenges in Sharif CTF were a good mix of different levels of difficulty. It didn’t help that for about 6 or 7 hours the site went offline due to some IP blacklisting issue and was hard to reach from outside Iran. Lesson learned: download offline challenges early in order to avoid twiddling thumbs during possible outages.
2017 SANS Holiday Hack Challenge (HHC) was awesome this year - just as expected! A great mix of fun and education, and a perfect way to spend the down time during the holidays.
SECCON CTF didn’t disappoint this year either - lots of interesting challenges of all levels of complexity, all running without a hitch. A good brain workout!
Some very interesting and challenging tasks in HXP CTF. A well organized and managed event. Thanks HXP, I had a lot of fun (and stress )!
Pwn2Win was in interesting event - ran pretty smoothly, challeges were … challenging and the admins were responsive. It’s the first event that I saw that uses NIZK for scoring, should be a good way to cut down on questions about scoring reliability and fairness. Thanks for the great competition and learning experience!
FLARE-ON 2017 was very rewarding - what a great opportunity to sharpen reverse engineering skills! I ran out of time in the middle of the last challenge but the whole thing was still totally worth it. Big thanks to the organizers - I’m tooking forward to trying it again next year!
HackIT ran on August 25-27 in Harkiv, Ukraine. Lots of challenging tasks, most of them well done. Some stabilty issues, but organizers were on the Telegram channel and corrected problems as they came up. Thanks for the fun event!
RCTF is a fairly new event, however the quaity of challenges was surprisingly high, as was the overall organization. All in all - a fun competition.
DEF CON CTF Qualifier was humbling. No cheesy challenges here, I had to sweat for every one of them. The site design seemed very minimalistic, but flashy UI is not what it’s all about.
No shortage of tough challenges in PlaidCTF… Overall a very impressive competition, no wonder it’s considered to be one of the top CTF events. I guess mature CTFs all had enough time to polish their UIs and gain enough experience to make sure their events go smoothly and with few hiccups.
ASIS CTF Quals was organized very well. Sleek site, well-designed challenges, and organizers responding in a timely manner on chat. I was impressed! As usual - lots to learn and plenty of problems to agonize over…
Organizers did a great job with VolgaCTF Quals, you can tell that they have been doing this for several years. Things were very well set up and thought through, and most of it went without a hitch. Some of the online challenges were kind of slow, but the admins seemed to be responsive to requests for help and fixed challenges fairly quickly when they went down. I had a great time and learned a lot.
0CTF was a tough event. What does not kill me makes me stronger! Not to mention it’s a great way to gain lots of practical knowledge fast…
Just took part in a very challenging Boston Key Party CTF. Although I solved just one problem, the competition made me take an in depth look at seveal areas I have not dealt with before. All in all a great opportunity to expand my knowledge!
Codegate Prequal CTF was a very tough competition, the first one I have seen with almost exclusive emphasis on Reverse Engineering. Still, it was a great learning experience, which highlighted what areas of RE I need to read up on and practice.
Challenges in Alex CTF seemed easier than the ones in some of the other CTFs I have seen and the 3 days to complete them was pretty generous. That’s the best way of doing it, I think - when stress is lower you can think more creatively and come up with higher quality solutions.
This Christmas I took part in SANS Holiday Hack Challenge - and had a blast! What a fun ride it was. Modeled as a retro computer game it had security challenges masterfully woven into the script, making for an entertaining experience that also teaches important lessons about various security vulnerabilities.
33C3 CTF was intense! This is the toughest CTF I’ve been in so far. A very humbling experience…
SECCON 2016 Online CTF ran for just 24 hours. This defintely makes for a more intense competition, especially since the challenges did not seem to be any easier than the ones at 48-hour events.