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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.

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 - 52149 players

Position Username Points Gold Last Validation Special Mention
151
Akorlith
370 0 2022-07-13 06:48:16
152
0xFF1E071F
368 0 2022-02-27 09:29:38
153
freak_out
362 0 2017-12-16 16:40:51
154
mnadeau
361 1 2025-02-11 14:45:20
155
funnymak3r
361 1 2025-02-03 06:56:50
156
Felis-Sapiens
354 0 2016-10-07 07:18:23
157
stefano118
349 1 2019-04-27 21:31:10
158
bluerng
349 1 2018-04-18 06:41:41
159
hrundelborger
349 0 2022-09-05 18:14:38
160
wiz3kid
343 10 2025-01-16 13:58:34
161
_Unkn0wn_
343 9 2017-08-28 13:14:18
162
kensalt
340 0 2021-04-30 15:17:27
163
zM_
337 6 2025-05-25 13:34:15
164
Fooker
335 2 2022-09-29 12:38:19
165
patacca
335 1 2023-07-09 14:38:22
166
fatihender
330 118 2017-08-22 05:26:58
167
xehos
329 0 2025-04-07 21:25:49
168
benjamin6A
327 0 2020-02-08 01:49:44
169
arthepsy
326 0 2017-11-15 17:26:50
170
im4vk
325 0 2023-11-14 14:45:15
171
HPx
324 2 2015-03-05 16:20:00
172
rebe11ion
322 0 2019-05-17 23:43:13
173
TyrannoKing
321 10 2015-07-20 00:13:07
174
ProCtf
320 24 2023-10-05 19:50:31
175
nitbx
319 1 2019-01-30 01:54:01
176
benito255
319 0 2024-04-28 22:08:19
177
baklava
319 0 2020-08-18 20:07:09
178
Dreaminx
317 0 2025-04-09 19:15:24
179
gsdt
316 2 2019-11-02 00:11:43
180
pandolia
316 1 2023-06-30 09:51:50
181
bu19akov
315 56 2024-04-28 14:40:13
182
autofix_ts
314 0 2016-04-15 08:47:00
183
xwosch
313 1 2022-02-26 10:41:08
184
c0l0a0f8
312 0 2022-08-17 13:38:55
185
christrc
310 1 2018-08-04 12:37:18
186
d4sher
310 1 2017-11-14 04:23:07
187
ghostarif
309 1 2025-06-21 01:29:20
188
colonelzombie
309 0 2018-06-12 02:37:28
189
kichung
308 0 2018-05-18 12:13:44
190
hugbed
307 91 2017-11-04 23:57:06
191
funny_guy
306 2 2020-03-04 07:38:51
192
slothy
303 1 2017-11-13 22:47:03
193
fishinspace
298 0 2023-05-07 02:26:26
194
whoisme
297 0 2020-04-10 13:03:48
195
ifftq2016
296 10 2019-02-25 08:12:25
196
fclout
294 59 2015-06-13 23:20:09
197
noscope_hacker
290 0 2023-09-08 10:33:02
198
meme
290 0 2016-09-10 20:14:39
199
EricHogue
288 275 2025-04-21 08:49:54
200
KptCheeseWhiz
288 0 2021-01-21 20:18:00

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Latest challenges validations


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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