Linksys WRT1900ACS - Can it do secure file transfer over internet?

I have a Linksys WRT1900ACS - still running factory firmware. It can do FTP over the internet to transfer files onto a USB drive plugged into the router. Problem is that it sends user/password and files in the clear. So basically I would be handing my data over to any interested party. Like hanging my house keys on my doorknob so I can get in later.

Does OpenWRT replace this functionality with a secure protocol on this router?

Openwrt includes scp if thats what your asking.