So, I've heard you're kinda new to cryptography ? </br>
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Basically, in almost every challenge you'll be provided a ciphertext that will look mostly garbage to you, and your goal will be to recover the original message. </br>
Messages are usually encrypted with a well-known cipher, so first step would be to guess the cipher and do some research on how to break it. </br>
Here is a list of useful websites: </br>
- https://www.dcode.fr/en </br>
- https://gchq.github.io/CyberChef/ </br>
- https://docs.python.org/3/ (because if you try to solve the crypto challenges in C it will be long and painful) </br>
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The flag is the decrypted message put into 42CTF{}. </br>
Ex: 42CTF{Th1s_1s_a_Fl4g}<br>
Good luck !