interencdec

Overview

Can you get the real meaning from this file.

Download the file here.

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Solution

The give string is a base64 decoded string. I used Cyber chef to decode the given string.

https://gchq.github.io/CyberChef/#recipe=From_Base64('A-Za-z0-9%2B/%3D',true,false)Find_/_Replace(%7B'option':'Regex','string':'%5Bb%5C'%5D'%7D,'',true,false,true,false)From_Base64('A-Za-z0-9%2B/%3D',true,false)ROT13(true,true,false,19)&input=WWlka00wSnhaR3R3UWxSWWRIRmhSM2cyWVVoc1ptRjZUbkZsVkd3eldWUk9jbGd5TUhkTmFrVjVUbnBWTkdaUlBUMG5DZz09

Flag: picoCTF{caesar_d3cr9pt3d_f0212758}