Case: the client used the langerhans android dogecoin wallet and saved the backup on his drobox in 2014. recently he remember this and get back the backup.. but when he try to restore the backup on his phone. it always ask for a password he did not set at all. according to his record, there is about 45k doge in the backup.
solution: we have similar case before and write the script to decrypt such backup. so his doge is recovered within 5 minutes.