If you want the result to resemble the original file, SHA-1 or any other hashing scheme is not the answer. Instead you want something like this.
My suggestion is to take a "white list" approach, meaning don't try and filter out bad characters. Instead define what is OK. You can either reject the filename or filter it.
If you want to filter it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.