Is it OK to have a blatantly false slogan?

I noticed that too and was heavily discouraged from reading any further . .

Oh come on, it's advertising.

I just keep a TrueCrypt volume in Dropbox. I can read it on Mac, Windows, or Linux and it's secure. I use this for taxes and stuff, and don't encrypt non-sensitive stuff so that I get more granular versioning.

With TrueCrypt you can actually unmount it and make it inaccessible even to people who have physical access to the machine. I don't see any instructions on how to do this with SecretSync, even in their FAQ, but from their documentation it appears this would need to be done:

1) Open the app and click Stop sync

2) Delete the SecretSync folder (make sure it's really deleted and isn't in the Trash or Recycle Bin)

http://getsecretsync.com/ss/getstarted/#stopstart

I use encFS (+ iconv fuse fs for Mac's different umlaut handling) and it works pretty well. I'd have hoped someone wrote a cool frontend to encFS + Dropbox (+ iconv fuse fs on mac)

Note that this is probably (not that I've read any details on the implementation) not sufficient to hide the fact that you have known copyrighted files in your SecretSynced DropBox storage.

Note that this uses a password known to SecretSync (but not Dropbox) by default (see the FAQ); to be fair, you can use a private password, but...

Or use a service that has client side encryption built in like Oxygen Cloud (disclaimer I work for them)

http://boxcryptor.com is another option.