In Level14 we are given an encrypted token: 857:g67?5ABBo:BtDA?tIvLDKL{MQPSRQWW. and the cipher. We can try to reverse the cipher but lets play with it and see if we can find out the encryption routine: level14@nebula:/home/flag14$ ./flag14 -e aaaaaaaaaaaaaaaaa abcdefghijklmnopq level14@nebula:/home/flag14$ ./flag14 -e abcdefg acegikm Ok, so it looks pretty simple, we shift a given characters a number of positions in the ASCII table where the key is the position of the character to encrypt.