SpiderOak - An Online Cloud Sharing & Cloud Backup that cares about your privacy
Zero-knowledge privacy - a feature SpiderOak is offering with their cloud services. With SpiderOak, you are able to share and back-up files in the cloud with 100% privacy...not even SpiderOak themselves can view your files. They're trying to set themselves apart from other cloud services, such as Dropbox, who have had questionable privacy in the past.
They define Zero-knowledge privacy as the following: "'Zero-Knowledge' privacy means the server NEVER knows the plaintext contents of the data being stored. Never. Your data is never at risk of being compromised or abused by internal threats or external hackers. Never."
This sounds great! But like the saying goes..."never say never"...I wonder if hackers could still find a way to access it. Let's hope not! You get 2GB with a free account :-)