APEX

I would like to seek for solution to perform the following task.

When user try to download the data through APEX it will zip the content with password protected.
Reason for doing so,
1. Extremely smaller fize size than the original uncompress file and faster transfer speed.
2. Protect the file from manually edited by user until it reach the local system.

The local system will also zip the data with password protected before send to APEX. (This part no problem).

When user try to upload this password protected zip file, APEX will be able to unzip this password protected zip file and load the data into specific table.
Reason for doing so,
Also the same as above.

Both the compress and decompress password will be invisible from user. Hope any of the expert here can kindly advise on the process of doing this task.

Thanks.

Andy