The police need help decrypting one of your father's files. Fortunately you know where he wrote down all his backup decryption keys as a backup (probably not the best security practice). You are looking for the key corresponding to daedaluscorp.txt.enc. The file is stored on the shell server at /problems/grepfriend/keys .

hint:Grep[1] is your friend!

[1]http://www.uccs.edu/~ahitchco/grep/