Encrypt Dropbox, SkyDrive, Google Drive, and the Cloud files.
FromCloudfogger:Cloudfogger is the free all-in-one encryption solution for files on your computer, mobile devices, Dropbox and all other cloud storage providers, from SkyDrive to Google Drive. Protect your online privacy with simple and secure AES encryption for all your files, no matter where they are. Securely share encrypted files with others. Cloudfogger - File Encryption finally made simple.
Password protect files and folders on mac.
Protect your private personal files from unauthorized access.
Encrypt files easily.