[willemmali]

You can always put your files in OwnCloud in a TrueCrypt container, and anything that's unlocked by a password can use a Yubikey password with head-stored additions.

I'm not aware of ready-made solutions to locally decrypt cloud-stored data on mobile phones though, I don't think you can mount TrueCrypt volumes on your phone. Anyone know of a way to do this?

[tiatia]

Hetzner (Germany) has quite cheap storage. https://www.hetzner.de/de/hosting/storagebox/bx30

Based on the protocols they offer it is easy to mount encrypted. LUKS is available for Android (rooted) https://play.google.com/store/apps/details?id=com.nemesis2.l...

[ParaLaffer]

Does OwnCloud do the block-sync like Dropbox for TrueCrypt containers, or does it need to reupload the entire container if the container is modified?