HXP CTF 2018

December 9, 2018

HXP CTF was as great as last year - well done guys! Well organized, went without a hitch, challenges were tough and mentally stimulating. Solved several, came really close on a couple more. No matter how many times you know of exploiting something there is always one more - HXP challenges are great examples of unorthodox approaches to doing things.

Read More

Kaspersky Industrial CTF 2018

November 25, 2018

I have mixed impressions of Kaspersky Industrial CTF - it was unusual to have no live chat, no announcements, no varying degrees of challenge difficulty; the “industrial” nature of the CTF was not reflected in the tasks. On the other hand the challenges were interesting and hard, so it was a great learning experience with lots of variety - from PHP serialization to .Net obfuscation. In any case - time well spent.

Read More

Volga CTF 2018

March 26, 2018

Volga CTF didn’t disappoint - very smoothly run, and the challenges were pretty inventive and quite complex. Great job organizers!

Read More

Sharif CTF 2018

February 4, 2018

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.

Read More

SECCON Online CTF 2017

December 11, 2017

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!

Read More

HXP 2017

November 19, 2017

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 :smile:)!

Read More

Pwn2Win 2017

October 21, 2017

Pwn2Win was in interesting event - ran pretty smoothly, challeges were … challenging :smile: 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!

Read More


October 17, 2017

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!

Read More

HackIT CTF 2017

August 28, 2017

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!

Read More

RCTF 2017

May 23, 2017

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.

Read More

PlaidCTF 2017

April 23, 2017

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.

Read More

ASIS CTF 2017 Quals

April 10, 2017

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… :smile:

Read More

VolgaCTF 2017 Quals

March 27, 2017

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.

Read More

0CTF 2017 Quals

March 19, 2017

0CTF was a tough event. What does not kill me makes me stronger! :smile: Not to mention it’s a great way to gain lots of practical knowledge fast…

Read More

Boston Key Party CTF 2017

February 27, 2017

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!

Read More

Alex CTF 2017 Writeups

February 7, 2017

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. :smile:

Read More