CryptoHack is a fun platform to learn modern cryptography through solving challenges and cracking insecure code. Can you reach the top of the leaderboard?
It was founded by two crypto enthusiasts from the UK, hyperreality and Jack. hyperreality is currently working as a devops engineer and Jack is studying for a PhD in black holes.
We bonded over our shared passion for solving crypto CTF challenges, but realised that most people find it a tough topic. We wanted to build a "HackTheBox of crypto", where users are encouraged to learn about how crypto works, and how to break it when it doesn't. We'll be continuing to release new challenges to stay up-to-date with the latest attacks and techniques.
The site was released to the world on 26th March 2020.
Here's our Discord channel: https://discord.gg/h9E7cna5pV
It was founded by two crypto enthusiasts from the UK, hyperreality and Jack. hyperreality is currently working as a devops engineer and Jack is studying for a PhD in black holes.
We bonded over our shared passion for solving crypto CTF challenges, but realised that most people find it a tough topic. We wanted to build a "HackTheBox of crypto", where users are encouraged to learn about how crypto works, and how to break it when it doesn't. We'll be continuing to release new challenges to stay up-to-date with the latest attacks and techniques.
The site was released to the world on 26th March 2020.
Here's our Discord channel: https://discord.gg/h9E7cna5pV
| Sites origin country |  |
|---|---|
| Language | English |
| Category Tags | Crypto |
| Site Admins | hyperreality |
| Auto update | yes |
| Has OnSiteRank | yes |
| WarBoxes | 0 |
| Score | 30151 |
| Base-Score | 10000 |
| Users | 143958 |
| Challs | 240 |
| Linked users | 536 |
| Average | 11.55% |
| Difficulty | 100.00% |
| Enjoyment | 100.00% |
| Discord | https://discord.gg/h9E7cna5pV |
| Latest 15 active Players, ordered by last update (14d) | ||||||
|---|---|---|---|---|---|---|
| nikost | hyperreality | Xaav | benito255 | jagotu | fsharp | rayaseiren |
| wekito | AACDAI | Cerades | j_m | r777_ | mm301 | LACiA |
| itsyourdecide | ||||||
Comments on CryptoHack
Global Rank: 200
Totalscore: 110795
Posts: 1822
Thanks: 1403
UpVotes: 984
Registered: 18y 245d
Last Seen: 14d 8h
The User is Offline
RE: Comments on CryptoHack
Apr 09, 2020 - 15:07:19 (6y 192d)
Apr 09, 2020 - 15:07:19 (6y 192d)
I have to say that this site is awesome for crypto.
I am still thinking about euler totients for creating a private key
I am still thinking about euler totients for creating a private key
The geeks shall inherit the properties and methods of object earth.
Global Rank: 140
Totalscore: 144420
Posts: 129
Thanks: 109
UpVotes: 127
Registered: 12y 35d
Last Seen: 4h 31m
The User is Offline
RE: Comments on CryptoHack
Apr 09, 2020 - 17:14:30 (6y 192d)
Apr 09, 2020 - 17:14:30 (6y 192d)
Yes, I totally agree with you. It is very rare such a site. I remind that I'm not a coder (it remains a dream-job), and I can tell that I learned a lot in just few challenges.
Great site!!!
Great site!!!
Global Rank: 200
Totalscore: 110795
Posts: 1822
Thanks: 1403
UpVotes: 984
Registered: 18y 245d
Last Seen: 14d 8h
The User is Offline
RE: Comments on CryptoHack
Apr 16, 2020 - 22:02:43 (6y 185d)
Apr 16, 2020 - 22:02:43 (6y 185d)
Is there a forum or irc or other chat?
The geeks shall inherit the properties and methods of object earth.
Global Rank: 6
Totalscore: 607410
Posts: 374
Thanks: 398
UpVotes: 408
Registered: 17y 8h
Last Seen: 23s
The User is Online
RE: Comments on CryptoHack
Apr 16, 2020 - 22:13:44 (6y 185d)
Apr 16, 2020 - 22:13:44 (6y 185d)
Discord as noted in https://www.wechall.net/site/details/99/CryptoHack
Totalscore: 959752
Posts: 27
Thanks: 28
UpVotes: 26
Registered: 18y 194d
The User is Offline
RE: Comments on CryptoHack
Jun 10, 2026 - 08:21:08 (129d 15h)
Jun 10, 2026 - 08:21:08 (129d 15h)
Don't seem to be able to update stats on CryptoHack any more?
GWF_HTTP
7 - Failed to connect to cryptohack.org port 443: Connection timed out
GWF_HTTP
7 - Failed to connect to cryptohack.org port 443: Connection timed out
Global Rank: 6
Totalscore: 607410
Posts: 374
Thanks: 398
UpVotes: 408
Registered: 17y 8h
Last Seen: 23s
The User is Online
RE: Comments on CryptoHack
Jun 10, 2026 - 17:25:30 (129d 6h)
Jun 10, 2026 - 17:25:30 (129d 6h)
Thx for the report, it should work again!
Due to the current attacks, we have a very aggressive blocking strategy, which also hit cryptohack.org.
Due to the current attacks, we have a very aggressive blocking strategy, which also hit cryptohack.org.
benito255, gucarvalho03, lange, jjxecure, sharp_pen, feicuijade, quangntenemy, TheHiveMind, Z, balicocat, Ge0, arraez, jcquinterov, hophuocthinh, alfamen2, burhanudinn123, Ben_Dover, stephanduran89, braddie0, fpombal, csuquvq, Psycho01010 have subscribed to this thread and receive emails on new posts.
1 people are watching the thread at the moment.
This thread has been viewed 14892 times.
1 people are watching the thread at the moment.
This thread has been viewed 14892 times.