interesting.... what would be the advantage of ziping it twicejust zip them and then encrypt them by adding a password, and if you dont want people to be able to see the files at all, not only not access them you will have to put them in a zip then zip the zip and add a password to encrpyt the outsided ziped file... if that makes any sense at all hahaah
here is a diagram
{zip with encryption
{zip
Main File
}
}