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 [Stripe CTF 2.0](https://github.com/stripe-ctf) | Past security contest where you can discover and exploit vulnerabilities in mock web applications.
 [Windows / Linux Local Privilege Escalation Workshop](https://github.com/sagishahar/lpeworkshop) | Practice your Linux and Windows privilege escalation
 [Hacking Articles](http://www.hackingarticles.in/ctf-challenges1/) | CTF Brief Write up collection with a lot of screenshots good for beggainers
+[Hacker101 CTF](https://ctf.hacker101.com/) | CTF hosted by HackerOne, always online. You will receive invitations to some private programs on HackerOne platform as a reward.
 
 ### Reverse Engineering, Buffer Overflow and Exploit Development
 Name    |     Description