All users which currently have 100% on a site.
| Username | Site | First Track | Master since | Track-Time | From | |
|---|---|---|---|---|---|---|
 | kazenojiyu | RedTigers Hackit | Jul 02, 2016 - 20:23:27 | Jul 02, 2016 - 20:28:52 | 5m 25s | 0,00% |
 | kazetkazet | hackburger | Oct 23, 2017 - 17:35:27 | Oct 23, 2017 - 17:35:27 | 0s | 100,00% |
| kazetkazet | RedTigers Hackit | Sep 25, 2016 - 15:27:43 | Sep 25, 2016 - 17:01:12 | 1h 33m | 2,17% |
| kazetkazet | hax.tor.hu | Sep 20, 2016 - 19:07:26 | Mar 15, 2017 - 17:05:01 | 175d 21h | 4,00% |
 | KazWolfe | ae27ff | Aug 28, 2019 - 06:04:01 | Aug 28, 2019 - 06:04:01 | 0s | 100,00% |
 | kcats | SuNiNaTaS | Jul 03, 2014 - 18:34:39 | Jul 29, 2014 - 11:02:49 | 25d 16h | 66,87% |
| KCJones | RedTigers Hackit | May 23, 2016 - 03:15:38 | May 23, 2016 - 10:17:28 | 7h 1m | 0,00% |
 | Kender | hax.tor.hu | Jun 01, 2009 - 12:40:09 | Jun 02, 2009 - 20:11:14 | 1d 7h | 26,00% |
| Kender | +Ma's Reversing | Feb 28, 2009 - 23:59:57 | May 04, 2009 - 18:23:27 | 64d 18h | 50,00% |
| Kender | Electrica | Feb 02, 2009 - 15:10:16 | May 30, 2009 - 09:23:00 | 116d 18h | 36,36% |
| Kender | HackQuest | Mar 13, 2008 - 20:26:32 | Mar 13, 2008 - 20:26:32 | 0s | 100,00% |
 | kepten | Gekko | Aug 25, 2011 - 15:16:53 | Jul 17, 2013 - 13:15:06 | 1y 326d | 47,62% |
| kepten | HackThisSite | Nov 15, 2010 - 16:16:11 | Jan 27, 2021 - 22:58:15 | 10y 76d | 57,31% |
 | kernelpanic | +Ma's Reversing | Dec 29, 2018 - 23:59:18 | Dec 29, 2018 - 23:59:18 | 0s | 100,00% |
| kev1 | RedTigers Hackit | Dec 12, 2013 - 10:19:07 | Dec 26, 2013 - 09:58:15 | 13d 23h | 8,68% |
| kev1 | HackBBS | Aug 13, 2010 - 22:35:33 | Jan 04, 2013 - 17:28:51 | 2y 144d | 81,08% |
| kev1 | HackThisSite | Apr 07, 2010 - 20:45:35 | Apr 05, 2023 - 20:31:09 | 13y 23h | 5,58% |
| kevinhyun | SuNiNaTaS | May 08, 2014 - 06:10:42 | May 14, 2014 - 10:47:36 | 6d 4h | 6,91% |
 | kiam | SuNiNaTaS | May 08, 2020 - 08:32:33 | May 14, 2020 - 12:52:50 | 6d 4h | 0,00% |
 | kijibwa | HackThisSite | Apr 06, 2010 - 05:07:43 | Jan 16, 2021 - 03:08:28 | 10y 287d | 95,53% |
 | Kilttarily | RedTigers Hackit | May 26, 2026 - 11:08:58 | Jun 02, 2026 - 09:04:11 | 6d 21h | 18,66% |
| Kilttarily | try to decrypt | Feb 18, 2026 - 08:06:48 | May 30, 2026 - 04:10:33 | 100d 20h | 1,79% |
| Kilttarily | SuNiNaTaS | Feb 09, 2026 - 16:15:40 | Mar 20, 2026 - 07:21:34 | 38d 15h | 0,00% |
| Kilttarily | Hack The Web | Jul 02, 2025 - 05:08:21 | Jul 12, 2025 - 16:05:39 | 10d 10h | 2,84% |
| KimTruth | SuNiNaTaS | Aug 09, 2014 - 13:54:37 | Dec 20, 2014 - 09:50:51 | 132d 19h | 3,71% |
| kingpbz | RedTigers Hackit | Apr 19, 2018 - 11:19:51 | Apr 23, 2018 - 11:25:28 | 4d 5m | 0,00% |
| kismet | HackThisSite | Oct 11, 2025 - 09:42:46 | May 18, 2026 - 22:23:46 | 219d 12h | 0,00% |
| kismet | Hack The Web | Oct 07, 2025 - 06:37:13 | Jan 26, 2026 - 02:27:26 | 110d 19h | 0,00% |
| kismet | LordofSQLi | Oct 02, 2019 - 21:29:21 | Oct 19, 2025 - 03:59:28 | 6y 18d | 2,04% |
| kismet | RedTigers Hackit | May 22, 2013 - 21:05:48 | Jun 20, 2016 - 22:35:30 | 3y 30d | 0,00% |
| kismet | SuNiNaTaS | Apr 20, 2012 - 16:59:47 | Oct 26, 2025 - 05:30:07 | 13y 191d | 0,00% |
| kismet | hax.tor.hu | Dec 01, 2011 - 17:33:12 | Jan 28, 2017 - 05:49:23 | 5y 59d | 2,00% |
| kitchan | HackThisSite | Aug 30, 2009 - 06:57:05 | Apr 05, 2023 - 20:30:38 | 13y 221d | 68,81% |
| kithyane | CSTutoringCenter | Jan 10, 2011 - 18:32:07 | Feb 08, 2011 - 21:34:07 | 29d 3h | 0,00% |
| kkaddol | SuNiNaTaS | Sep 17, 2020 - 03:13:23 | Sep 17, 2020 - 03:13:23 | 0s | 100,00% |
| kmc0487 | Webhacking.kr | Mar 13, 2025 - 04:15:58 | Mar 13, 2025 - 04:15:58 | 0s | 100,00% |
| KnightChaser | SuNiNaTaS | Oct 08, 2023 - 15:05:29 | Oct 15, 2023 - 12:59:31 | 6d 21h | 70,75% |
| KnightKoroviev | RedTigers Hackit | Oct 02, 2014 - 21:10:03 | Oct 07, 2014 - 18:12:14 | 4d 21h | 2,17% |
| KnightKoroviev | Reversing.Kr | Feb 21, 2014 - 22:01:23 | Apr 28, 2014 - 00:01:28 | 65d 2h | 0,00% |
| koma | Root-Me | Oct 23, 2011 - 00:38:37 | Feb 10, 2012 - 16:37:20 | 110d 15h | 74,40% |
 | kompel | SuNiNaTaS | Oct 19, 2023 - 15:42:22 | Nov 25, 2023 - 11:19:00 | 36d 19h | 0,00% |
| kompel | RedTigers Hackit | Mar 19, 2021 - 22:49:53 | Jul 29, 2021 - 10:16:07 | 131d 11h | 0,00% |
| kompel | LordofSQLi | Mar 18, 2021 - 23:31:09 | Aug 23, 2021 - 15:53:40 | 157d 16h | 4,08% |
 | Kot | hax.tor.hu | Aug 21, 2009 - 20:57:34 | Aug 21, 2009 - 20:57:34 | 0s | 100,00% |
| KSHMK | Reversing.Kr | Jan 12, 2017 - 00:23:40 | Jan 12, 2017 - 00:23:40 | 0s | 100,00% |
| ksisyn | HackThisSite | Jul 27, 2017 - 01:53:14 | Apr 05, 2023 - 20:38:21 | 5y 253d | 82,20% |
| ksydfius | HackThisSite | Apr 05, 2023 - 20:32:27 | Apr 05, 2023 - 20:32:27 | 0s | 100,00% |
| ksydfius | RedTigers Hackit | Nov 24, 2013 - 21:08:38 | Nov 24, 2013 - 22:38:05 | 1h 29m | 0,00% |
 | kumaus | try to decrypt | Nov 15, 2017 - 15:40:10 | Nov 15, 2017 - 15:40:10 | 0s | 100,00% |
| kumaus | Hacker Gateway | Mar 28, 2017 - 16:44:52 | Apr 03, 2017 - 14:33:32 | 5d 21h | 65,22% |