Case: the client recently remembered he has bought 100k dogecoin in later 2014. when the doge price goes up so much he found his 100k doge value about $50 in 2014 now turn into a lot of money. he cna only remember he used multidoge wallet and the backup is encrypted. but he cant get the password. he also tried to bruteforce the password but failed.
Solution: we digged a lot info from him and created a huge password list. then bruteforce it and get the password recovered in 10 minutes.