The usual way to do this is to use an symmetric encryption key which is derived from the user's password. The standard way to do this is using the algorithm specified in RFC2898 which generates a set of cryptographically secure bytes you can use as a key and IV. It's probably supported by a library for your language, .
NET for example, which is what I use has the Rfc2898DeriveBytes class.
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.