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 | 29922 |
| Base-Score | 10000 |
| Users | 132584 |
| Challs | 233 |
| Linked users | 520 |
| Average | 10,92% |
| Difficulty | 100,00% |
| Enjoyment | 100,00% |
| Discord | https://discord.gg/h9E7cna5pV |
Comments on CryptoHack
Global Rank: 198
Totalscore: 110647
Posts: 1795
Thanks: 1390
UpVotes: 961
Registered: 18y 258d
Last Seen: 64d 15h
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RE: Comments on CryptoHack
Apr 09, 2020 - 15:07:19 (6y 204d)
Apr 09, 2020 - 15:07:19 (6y 204d)
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: 135
Totalscore: 143258
Posts: 128
Thanks: 109
UpVotes: 127
Registered: 12y 47d
Last Seen: 113d 19h
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RE: Comments on CryptoHack
Apr 09, 2020 - 17:14:30 (6y 204d)
Apr 09, 2020 - 17:14:30 (6y 204d)
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: 198
Totalscore: 110647
Posts: 1795
Thanks: 1390
UpVotes: 961
Registered: 18y 258d
Last Seen: 64d 15h
The User is Offline
RE: Comments on CryptoHack
Apr 16, 2020 - 22:02:43 (6y 197d)
Apr 16, 2020 - 22:02:43 (6y 197d)
Is there a forum or irc or other chat?
The geeks shall inherit the properties and methods of object earth.
Global Rank: 5
Totalscore: 607613
Posts: 324
Thanks: 335
UpVotes: 341
Registered: 17y 12d
Last Seen: 113d 12h
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RE: Comments on CryptoHack
Apr 16, 2020 - 22:13:44 (6y 197d)
Apr 16, 2020 - 22:13:44 (6y 197d)
Discord as noted in https://www.wechall.net/site/details/99/CryptoHack
Totalscore: 844769
Posts: 24
Thanks: 26
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Registered: 18y 206d
The User is Offline
RE: Comments on CryptoHack
Jun 10, 2026 - 08:21:08 (142d 4h)
Jun 10, 2026 - 08:21:08 (142d 4h)
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: 5
Totalscore: 607613
Posts: 324
Thanks: 335
UpVotes: 341
Registered: 17y 12d
Last Seen: 113d 12h
The User is Offline
RE: Comments on CryptoHack
Jun 10, 2026 - 17:25:30 (141d 19h)
Jun 10, 2026 - 17:25:30 (141d 19h)
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.
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