Dropbox takes every precaution to keep your data secure. They use SSL encryption to make sure that while you send your files to them, the network packets can’t be compromised. Once they receive your files, they store them encrypted on their servers. They also use internal policies to ensure that employees can’t access your files.
The difference is that SecretSync provides client-side encryption, while Dropbox provides encryption at the server. This just means that they’re not asking you to trust them, or anyone, with your data. Your computer encrypts your files first, before anyone else has a chance to access them.
SecretSync installs a tunnel folder that goes inside your Dropbox. Files are encrypted before being put in here. The tunnel folder is inside Dropbox to allow it to sync your encrypted files to your other devices.
- Sync encrypted files with Dropbox and SecretSync (sciencetext.com)