Description:<span>I created my own cipher and encrypted the very important file.However, I lost the decryption program because of file system error, so now I cannot read the file.Please help me.Writeup: </span>http://van.prooyen.com/reversing/cryptography/2016/12/11/Lost-Decryption-Writeup.html<span>Downloads:Challenge: </span>https://github.com/docileninja/docileninja.github.io/raw/master/files/lost_decryption.zipSolution: https://github.com/docileninja/docileninja.github.io/blob/master/files/lost.c