5 websites to practice hacking techniques for free!

Hello everyone, I’m Jay Chou. Recently, a friend asked me on WeChat: Is there a place to practice CTF?

The Chinese translation of CTF (Capture The Flag) is the capture the flag competition, which is a form of technical competition between technical personnel in the cyber security field.

In the competition, the flag of the problem is obtained through the form of technical problems, and thus the score is obtained. The technical aspects involve programming development, program reverse analysis, cracking, vulnerability attacks, network penetration, encryption and decryption, etc.

CTF originated from the DEFCON Global Hacking Conference in 1996, and since its development, it has become a popular form of competition in the global cyber security circle. Note that CTF is not the name of a competition, but a form of competition. Many large and small CTF competitions are held every year around the world.

CTF is very helpful for novices, especially students, to learn about network security. Today I will recommend some CTF training websites to everyone, all of which are free to use at no cost!

1、JarvisOJ

网址：https://www.jarvisoj.com/

JarvisOJ is a CTF online answering system developed by Jarvis, a student of the System Security Laboratory (USS Lab.) of Zhejiang University.

The topics on JarvisOJ's platform are mainly composed of the topics in the various competitions that the author has participated in, subject to the approval of the organizer, and part of the topics are original topics by the website authors.

2、BUUCTF

网址：https://buuoj.cn/challenges

This is a network security learning platform built by Anheng, and the quality of the questions is still very good:

3、websec

网址：http://www.websec.fr

This is a foreign website, as can be seen from the name, it is biased towards Web security:

4、ringzeroctf

This is also a foreign website with more comprehensive coverage, covering code audits, reverse analysis, vulnerability attacks, Web, system security, etc.

5、wargames

Game-based hacker website that allows you to learn security techniques and concepts.

网址：http://overthewire.org/wargames/

So many learning websites, don’t you hurry up and save them?

In addition, another wave of hacking learning materials needs to be given to students to receive free of charge at the portal below

【Learning materials】

Finally, let’s talk a few more words. Although CTF is good, it doesn’t need to be over-consumed. It is very useful for beginners to broaden their horizons and consolidate knowledge through such topics. However, there is still a lot of gap between CTF topics and the problems encountered in actual work. Therefore, after the beginner stage, more practical work skills should be exercised. host.