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https://github.com/cryptomator/cryptomator

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.
https://github.com/cryptomator/cryptomator

cloud-storage crypto cryptography cryptomator encryption java privacy security

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Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

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README 

        
[![cryptomator](cryptomator.png)](https://cryptomator.org/)



[![Build](https://github.com/cryptomator/cryptomator/workflows/Build/badge.svg)](https://github.com/cryptomator/cryptomator/actions?query=workflow%3ABuild)

[![Known Vulnerabilities](https://snyk.io/test/github/cryptomator/cryptomator/badge.svg)](https://snyk.io/test/github/cryptomator/cryptomator)

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[![Twitter](https://img.shields.io/badge/[email protected]?style=flat)](http://twitter.com/Cryptomator)

[![Crowdin](https://badges.crowdin.net/cryptomator/localized.svg)](https://translate.cryptomator.org/)

[![Latest Release](https://img.shields.io/github/release/cryptomator/cryptomator.svg)](https://github.com/cryptomator/cryptomator/releases/latest)

[![Community](https://img.shields.io/badge/help-Community-orange.svg)](https://community.cryptomator.org)



## Supporting Cryptomator



Cryptomator is provided free of charge as an open-source project despite the high development effort and is therefore dependent on donations. If you are also interested in further development, we offer you the opportunity to support us:



- [One-time or recurring donation via Cryptomator's website.](https://cryptomator.org/#donate)

- [Become a sponsor via Cryptomator's sponsors website.](https://cryptomator.org/sponsors/)



### Gold Sponsors



Become our Gold Sponsor and showcase your brand to a targeted audience! Please contact us if you are interested.



### Silver Sponsors



  

    

      gee-whiz

      Route4Me

    

  



### Special Shoutout



Continuous integration hosting for ARM64 builds is provided by [MacStadium](https://www.macstadium.com/opensource).



MacStadium



---



## Introduction



Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud.



Download native binaries of Cryptomator on [cryptomator.org](https://cryptomator.org/) or clone and build Cryptomator using Maven (instructions below).



## Features



- Works with Dropbox, Google Drive, OneDrive, MEGA, pCloud, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory

- Open Source means: No backdoors, control is better than trust

- 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

- Four thousand commits for the security of your data!! :tada:



### Privacy



- 256-bit keys (unlimited strength policy bundled with native binaries)

- Scrypt key derivation

- Cryptographically secure random numbers for salts, IVs and the masterkey of course

- Sensitive data is wiped from the heap asap

- Lightweight: [Complexity kills security](https://www.schneier.com/essays/archives/1999/11/a_plea_for_simplicit.html)



### Consistency



- Authenticated encryption is used for file content 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](http://en.wikipedia.org/wiki/Single_point_of_failure)



### Security Architecture



For more information on the security details visit [cryptomator.org](https://docs.cryptomator.org/en/latest/security/architecture/).



## Building



### Dependencies



* JDK 22 (e.g. temurin, zulu)

* Maven 3



### Run Maven



```

mvn clean install

# or mvn clean install -Pwin

# or mvn clean install -Pmac

# or mvn clean install -Plinux

```



This will build all the jars and bundle them together with their OS-specific dependencies under `target`. This can now be used to build native packages.



## License



This project is dual-licensed under the GPLv3 for FOSS projects as well as a commercial license for independent software vendors and resellers. If you want to modify this application under different conditions, feel free to contact our support team.