PicoCTF19 Caesar

Challenge

Decrypt this message. You can find the ciphertext in /problems/caesar_5_d706b250ed3c6d2d2c72155de301a2f1 on the shell server.

picoCTF{dspttjohuifsvcjdpobqjtwtvk}

Hints

caesar cipher tutorial

Solution

There's only 26 possibilities for a Caesar cipher. There probably exists a tool online somewhere.

https://cryptii.com/pipes/caesar-cipher

Since the picoCTF isn't part of the flag, there's no way of knowing which substitution is correct so lets click through hoping to see some English.

Success on +25

Flag

picoCTF{crossingtherubiconapisvsuj}