file encryption

I have this workflow that’s extracting and processing some data, which is then exported to xls that should be sent over email. The process contains a loop, so it generates hundreds of files and they need to be separately sent to different receivers. This I got covered.

Problem is I should be encrypting this data that I’m sending with a password. Is there any way of doing that so that I don’t have to involve xls macros into the equation?