Cryptomator – multi-platform transparent client-side encryption of files in the cloud

Cryptomator encrypts your data quickly and easily, so you can safely upload it to your favourite cloud service. With Cryptomator you can create encrypted vaults. Each vault is protected by a password and can contain as many files and folders as you like.

The software encrypts each file individually. If you update one document, only these changes will get synchronized.

Cryptomator is free and open source software.

Features include:

  • Works with Dropbox, Google Drive, OneDrive, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory.
  • Client-side: No accounts, no data shared with any online service.
  • Totally transparent: Just work on the virtual drive as if it were a USB flash drive.
  • AES encryption with 256-bit key length.
  • File names get encrypted.
  • Folder structure gets obfuscated.
  • Use as many vaults in your Dropbox as you want, each having individual passwords.
  • Two thousand commits for the security of your data.
  • 256-bit keys (unlimited strength policy bundled with native binaries).
  • Scrypt key derivation.
  • Cryptographically secure random numbers for salts, IVs and the masterkey.
  • Sensitive data is wiped from the heap as soon as possible.
  • HMAC over file contents to recognize changed ciphertext before decryption.
  • I/O operations are transactional and atomic, if the filesystems support it.
  • Each file contains all information needed for decryption (except for the key of course), no common metadata means no SPOF.
  • Cross-platform support.

Support: Documentation, FAQ, GitHub Code Repository
License: GNU General Public License v3.0

Cryptomator is written in Java. Learn Java with our recommended free books and free tutorials.

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