In short, super secret techno wizardry. OneSafe uses a unique key for you that encrypts all of your files before they head off to the cloud. Using high grade disk-level encryption ensures no third party can access your files during upload or storage.
Client-side encryption means we can’t see your data, your cloud storage service can’t see your data, and malicious Internet bandits can’t see your data. Since you’re the only one with the key, you’re the only who can decrypt your files.