Goal : Find the password for next level. It is stored in data.txt, where all lowercase(a-z) and uppercase(A-Z) letters have been rotated by 13 positions.
A simple description of ROT13 from wikipedia is given above.
So now we need to convert the text from ROT13 to normal text. For that search for a online ROT13 converter.
Open any of them.
We got the password: 5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu