As suggested recently by 'How To Geek' I have installed Boxcryptor in my dropbox folder.

Boxcryptor was obviously inspired by Dropbox's limitations and as far as I can see solves them perfectly with encryption of every file at the client end.

Dropbox simply stores and syncs these encrypted files.

The linked article says : 'Ultimately, I’ve come to the conclusion that scale matters in the cloud. Microsoft, Google, and Amazon have the experience and the engineering depth to get operational and security issues right.'

Until a little while ago I wonder if the author would have objected to Sony being added to that list?