Cyber challenges

Credit to Oriyan

CTF: - https://www.root-me.org/?lang=en - Root Me offers free hacking challenges in various topics, including app security, programming, web, cryptography, and more.  - https://picoctf.org/ - PicoCTF offers free learning + challenges, specifically in CTF challenges. - https://overthewire.org/wargames/](https://overthewire.org/wargames/) - OverTheWire offers free "wargames", where you ssh into a remote machine and try to advance to the next level. Includes buffer overflows (Narnia), web (Natas), various linux topics (Bandit) and more. - https://www.hackthissite.org/ - https://ctftime.org/ - https://pwnable.tw/ - including web - https://pwnable.xyz/challenges/ - Another pwnable variation - https://www.vulnhub.com/ - VMs with various challenges, not very documented but interesting challenges. - pwn.college - https://cryptopals.com/ - Crypto challenges - https://cryptohack.org/ - Crypto challenges

Information: - https://portswigger.net/web-security - Training and labs for web security, from creators of Burp Suite (a very well known application for pentesting web applications) - https://www.linode.com/docs/guides/security/ - Good security practices for a linux sysadmin

Books: - https://data.cyber.org.il/os/os_book.pdf - Operating Systems, Barak Gonen (in hebrew! with focus on cyber security on Windows) - A few more books in hebrew from Israeli Cyber Education Center: https://cyber.org.il/data/ - Another one about networking (in hebrew) https://data.cyber.org.il/networks/networks.pdf - Reverse Engineering for Beginners, Dennis Yurichev https://beginners.re/. Good book, in various languages, small donation required to access book. Accompanied by (free) challenges: https://challenges.re/