PicoCTF Writeup – 13

Information: 

 

CTF Name: PicoCTF

CTF Challenge: 13

Challenge Category: Cryptography

Challenge Points: 100

PicoCTF 2019.

 

# Challenge Description: 

Cryptography can be easy, do you know what ROT13 is? cvpbPGS{abg_gbb_onq_bs_n_ceboyrz}

Hint: This can be solved online if you don’t want to do it by hand!

 

Writeup 

Well I know that ROT13 consists in a letter substitution cipher. In this cipher a letter is replaced with the 13th letter after it in the alphabet. (Reference: Wikipédia

Knowing this I decided to search online for a tool that would decipher the message. I came across this tool.

I inserted the given value and this was the output:

The flag is:

picoCTF{not_too_bad_of_a_problem}
Show flag
picoCTF{not_too_bad_of_a_problem}

Thank you very much for reading!

Cheers,

MRegra

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