[mvrekic]

Problem with this approach is sharing and key management.

If you want to send something to someone, that means you need to securely communicate the key to them first or take the SpiderOak approach of "We guarantee security locally but if you share a file = file is shared unencrypted".

[epper]

True, but if you both are friends on Wuala you can do it easily.

Provided that no man in the middle attacks take place during the "friendship" operation :)