You export your private keys and wallet, and encrypt them with your password and than store it on a USB, cloud...When you want to use your wallet you should decrypt your keys or wallet with your previous password and import them in Swing wallet.

You should use some app to encrypt file...search on google.

I am lazy and i didnt encrypt my hush and zen wallets/keys, but iv tested export/import walets/keys and its working without any problems.

EDIT: heres a google link for encryption programs : http://lifehacker.com/five-best-file-encryption-tools-5677725

EDIT 2: And dont encrypt all your funds...try with small amount and decrpyt and use it in your wallet....