Multi-platform transparent client-side encryption of your files in the cloud
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Cryptomator

Build Status Join the chat at https://gitter.im/totalvoidness/cryptomator

Multiplatform transparent client-side encryption of your files in the cloud.

If you want to take a look at the current beta version, go ahead and get your copy of cryptomator on Cryptomator.org or clone and build Cryptomator using Maven (instructions below).

Features

  • Totally transparent: Just work on the encrypted volume, as if it was an USB flash drive
  • Works with Dropbox, OneDrive (Skydrive), Google Drive and any other cloud storage, that syncs with a local directory.
  • In fact it works with any directory. You can use it to encrypt as many folders as you like
  • AES encryption with 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
  • No commerical interest, no government agency, no wasted taxpayers' money ;-)

Privacy

  • 256 bit keys (unlimited strength policy bundled with native binaries - 128 bit elsewhere)
  • Scrypt key derivation
  • 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

  • HMAC over file contents to recognize changed ciphertext before decryption
  • I/O operations are transactional and atomic, if the file systems supports it
  • Each file contains all information needed for decryption (except for the key of course). No common metadata means no SPOF

Building

Dependencies

  • Java 8
  • Maven 3
  • Optional: OS-dependent build tools for native packaging
  • Optional: JCE unlimited strength policy files (needed for 256 bit keys)

Building on Debian-based OS

apt-get install oracle-java8-installer oracle-java8-unlimited-jce-policy fakeroot maven git
git clone https://github.com/cryptomator/cryptomator.git
cd cryptomator/main
git checkout v0.6.0
mvn clean install

License

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