EasyCTF_2018: Substitute

Category: Crypto Points: 50 Description:

Nobody can guess this flag! msg.txt

Write-up

We are given a cryptic message that we are supposed to solve using substitution cipher. Thankfully, quipqiup exists.

FI! XJWCYIUSINLIGH QGLE TAMC A XCU NSAO NID EPC WEN AXM JL EIEASSF HDIGM IN JEL JXOCXGJEF. EPJL JL ASLI EPC LCWIXM HDIYSCT CZCD TAMC NID CALFWEN. PCDC: CALFWEN{EPJL_JL_AX_CALF_NSAO_EI_OGCLL} GLC WAHJEAS SCEECDL.

becomes

YO! NICEBOWLOFSOUP JUST MADE A NEW FLAG FOR THE CTF AND IS TOTALLY PROUD OF ITS INGENUITY. THIS IS ALSO THE SECOND PROBLEM EVER MADE FOR EASYCTF. HERE: EASYCTF{THIS_IS_AN_EASY_FLAG_TO_GUESS} USE CAPITAL LETTERS.

Therefore, the flag is EASYCTF{THIS_IS_AN_EASY_FLAG_TO_GUESS}.