How can I send an email to a person and be sure that
no one else can intercept it and read it?
I would like only the person who it is ment for to read it.
I want this to be easy for him to open and read.. not needing him/her to
go through loopholes and installations...

I have seen a "sign" button on OE, is this related?

Please guide me since I have never researched this perticular aspect ....

thanks