cryptomator

Open Cloud Encryptor

Multiplatform transparent client-side encryption of your files in the cloud. You need Java 8 in order to run the application. Get the runtime environment here: http://www.oracle.com/technetwork/java/javase/downloads/index.html

Features

• Totally transparent: Just work on the encrypted volume, as if it was an USB drive
• Works with Dropbox, Skydrive, Google Drive and any other cloud storage, that syncs with a local directory
• AES encryption with up to 256 bit key length
• Client-side. No accounts, no data shared with any online service
• Filenames get encrypted too
• No need to provide credentials for any 3rd party service
• Open Source means: No backdoors. Control is better than trust
• Use as many encrypted folders in your dropbox as you want. Each having individual passwords

Security

• Default key length is 256 bit (falls back to 128 bit, if JCE isn't installed)
• PBKDF2 key generation
• 4096 bit internal masterkey
• Cryptographically secure random numbers for salts, IVs and the masterkey of course
• Sensitive data is swiped from the heap asap
• Lightweight: Complexity kills security

Consistency

• I/O operations are transactional and atomic, if the file systems supports it
• Metadata is stored per-folder, so it's not a SPOF

Dependencies

• Java 8
• Maven

TODO

• Automount of WebDAV volumes for Win/Mac/Tux
• App icon and drive icons in WebDAV volumes
• Change password functionality
• Replace WebDAV implementation by more efficient and robust solution
• CRC32 checksums for decrypted files
• Better explanations on UI

License

Distributed under the MIT license. See the LICENSE file for more info.