Bun,

Using keys, as you suggest in your post, should be as secure as a password, if not more so, as long as you don't leave your private key lying around in a public directory somewhere.

Thanks for posting the howto. I've been doing this for a while on the tablet.

You can go one step further and install sshfs, and then, instead of using the scp command, you can mount remote directories on your tablet as if they were local directories. Then you can copy files using the File Manager.

Would a how-to on that be appreciated? I can write one up if people would like.