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RingZer0 Team Online CTF

RingZer0 Team's online CTF offers you tons of challenges designed to test and improve your hacking skills through hacking challenges. Register and get a flag for every challenge.



The RingZer0 Team Online CTF is now proudly hosted by NorthSec. 2025 trainings are now on sale, check them out!

Chat / Questions / Help

You'll find all what you need in the Discord Server.

Join the Discord now!

Challenges

Currently more than 300 challenges are available over 15 categories. Have fun resolving them.

View challenges »

Register

Your first time here? First step register an account, that way you will be able to login and start solving challenges.

Register »


Want to become certified RCEH?

Super simple: get at least 70% of the total points (which is 1240 points at the moment). With this certification, you will be able to buy a RCEH token that will be available on the shop. The RingZer0 Certified Elite Hacker (RCEH) certification is a highly technical certification. Anyone holding the RCEH title is a highly skilled hacker.

Once you get your RCEH title you can proudly use the certified logo and show to the rest of the world that you successfully managed to solve several hacking challenges on the RingZer0 CTF.


Scoreboard - 51992 players

Position Username Points Gold Last Validation Special Mention
151
0xFF1E071F
368 0 2022-02-27 09:29:38
152
freak_out
362 0 2017-12-16 16:40:51
153
mnadeau
361 1 2025-02-11 14:45:20
154
funnymak3r
361 1 2025-02-03 06:56:50
155
Felis-Sapiens
354 0 2016-10-07 07:18:23
156
stefano118
349 1 2019-04-27 21:31:10
157
bluerng
349 1 2018-04-18 06:41:41
158
hrundelborger
349 0 2022-09-05 18:14:38
159
wiz3kid
343 10 2025-01-16 13:58:34
160
_Unkn0wn_
343 9 2017-08-28 13:14:18
161
kensalt
340 0 2021-04-30 15:17:27
162
zM_
337 6 2025-05-25 13:34:15
163
Fooker
335 2 2022-09-29 12:38:19
164
patacca
335 1 2023-07-09 14:38:22
165
fatihender
330 118 2017-08-22 05:26:58
166
xehos
329 0 2025-04-07 21:25:49
167
benjamin6A
327 0 2020-02-08 01:49:44
168
arthepsy
326 0 2017-11-15 17:26:50
169
im4vk
325 0 2023-11-14 14:45:15
170
HPx
324 2 2015-03-05 16:20:00
171
rebe11ion
322 0 2019-05-17 23:43:13
172
TyrannoKing
321 10 2015-07-20 00:13:07
173
ProCtf
320 24 2023-10-05 19:50:31
174
nitbx
319 1 2019-01-30 01:54:01
175
benito255
319 0 2024-04-28 22:08:19
176
baklava
319 0 2020-08-18 20:07:09
177
Dreaminx
317 0 2025-04-09 19:15:24
178
gsdt
316 2 2019-11-02 00:11:43
179
pandolia
316 1 2023-06-30 09:51:50
180
bu19akov
315 56 2024-04-28 14:40:13
181
autofix_ts
314 0 2016-04-15 08:47:00
182
xwosch
313 1 2022-02-26 10:41:08
183
c0l0a0f8
312 0 2022-08-17 13:38:55
184
christrc
310 1 2018-08-04 12:37:18
185
d4sher
310 1 2017-11-14 04:23:07
186
colonelzombie
309 0 2018-06-12 02:37:28
187
kichung
308 0 2018-05-18 12:13:44
188
hugbed
307 91 2017-11-04 23:57:06
189
funny_guy
306 2 2020-03-04 07:38:51
190
ghostarif
305 1 2021-10-28 00:45:19
191
slothy
303 1 2017-11-13 22:47:03
192
fishinspace
298 0 2023-05-07 02:26:26
193
whoisme
297 0 2020-04-10 13:03:48
194
ifftq2016
296 10 2019-02-25 08:12:25
195
fclout
294 59 2015-06-13 23:20:09
196
noscope_hacker
290 0 2023-09-08 10:33:02
197
meme
290 0 2016-09-10 20:14:39
198
EricHogue
288 275 2025-04-21 08:49:54
199
KptCheeseWhiz
288 0 2021-01-21 20:18:00
200
Ramakrishnan9294
288 0 2020-07-21 14:36:55

Search by username


Latest challenges validations

Last validation Challenge User who solved it
2025-06-03 00:20:50 SysAdmin Part 2 orelbeatz
2025-06-03 00:17:36 SysAdmin Part 1 orelbeatz
2025-06-02 20:09:29 Some martian message L3n3h
2025-06-02 18:24:12 Hangovers and more: Bacon Cornibulateur
2025-06-02 17:37:51 Martian message part 3 Cornibulateur
2025-06-02 17:09:16 Sometime there is no buffer overflow klammydia
2025-06-02 15:59:10 Admin Portal Cornibulateur
2025-06-02 15:16:40 Looking for password file Cornibulateur
2025-06-02 14:52:49 The Cabal bluedevil
2025-06-02 12:47:03 C Jail 3 toxic

The latest write-up with special mention


The latest challenges added

Challenge Points Category
Passenger Manifesto (2/2) 4 NorthSec 2025
Passenger Manifesto (1/2) 5 NorthSec 2025
Photographic Memory System (2/2) 3 NorthSec 2024
Photographic Memory System (1/2) 3 NorthSec 2024
Linguistic Memory System 5 NorthSec 2024


Charles F. Hamilton started RingZer0 website in 2014 by hosting everything in his own garage (Picture here). You can find the list of users that contributed over the years here.


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