Boxcryptor!

Secure your files in the cloud the easy way and save your privacy. And the best: Its for free With Boxcryptor, you encrypt your files before uploading them to Dropbox, iCloud, Google Drive, OneDrive and many other providers without sacrificing safety, privacy or comfort. Even more privacy for you with Boxcryptor Unlimited and filename encryptionThe Boxcryptor Company Package offers additional features for businesses: Use a master key to be able to decrypt every employees files Set policies to enforce rules Central user management and billing List of supported storage providers:Dropbox, Dropbox for Business, GDrive, iCloud, OneDrive, OneDrive for Business, Box, SugarSync, Egnyte, Strato HiDrive, Telekom MagentaCLOUD, Cubby, GMX MediaCenter, Web.de Smartdrive, mailbox.org Drive, FileSpots, CloudMe, Storegate, PSMail Cabinet, Livedrive, Yandex Disk and others using WebDAV (e.g. OwnCloud).

* Windows https://www.boxcryptor.com/en/download
* Mac OS X https://www.boxcryptor.com/en/download
* Android https://play.google.com/store/apps/details?id
com.boxcryptor2.android * iOS https://www.boxcryptor.com/l/download-ios-store
* Browsers https://www.boxcryptor.com/en/labs