Cryptomator protects your cloud storage data (open source, multi-platform client encryption tool)

If you are looking for a cross-platform solution to encrypt your cloud storage files, it is recommended that you try Cryptomator.Cipher Is a free open source software tool that can provide client-side encryption for your cloud storage files, suitable for Windows, Mac, Linux, iOS and Android. The tool is very easy to use and supports any cloud storage provider local directory that it syncs with, so it can be used with Dropbox, Google Drive (Google Backup and Sync or what Google calls today), OneDrive, ownCloud, etc.

Because Cryptomator uses client-side encryption, this means that your data is encrypted first and then synchronized with the online cloud storage service, so no unencrypted data leaves your computer. Internally, Cryptomator uses WebDAV to provide unencrypted virtual drives, but Linux and Mac are still undergoing FUSE integration, and there is already Cryptomator Beta This version is included. Update: Cryptomator 1.4.0 has been released, it includes support for FUSE on Linux and macOS and Dokany on Windows.
With Cryptomator, you can encrypt the entire cloud storage, or only encrypt some important sensitive files, such as documents or any files you like. You can even create multiple vaults for a cloud storage provider. For example, you can have a vault for personal use and a vault shared with colleagues. Each vault has its own password. GitHub, But for security reasons, it is not recommended for inexperienced users.
Although Cryptomator is designed to encrypt your cloud storage data, you don’t have to use it with cloud storage providers. The application can also be used to simply encrypt folders on the system or some external drives.
You may also care about performance. Cryptomator developers say that there is no limit to the size of the file library, whether it is bytes or files, if you use some very large files, performance will not be greatly affected. However, for a directory that contains a large number of files (more than 1,000), the speed of directory listing may become slower.
What about its security? Cryptomator uses AES with 256-bit key length to encrypt file contents and file names (folder structure is also confused), while passphrases are protected by using brute force encryptionThis is a password-based key derivation function (this function is designed to be computationally intensive, so an attacker will need to perform billions of operations). You can read more about Cryptomator security on it. website.
I think that cloud storage encryption solutions must be free and open source software, safe, and multi-platform, because after all, we live in a world that requires access to files on multiple devices and is easy to use. Cryptomator has all these functions.
In the following, I wrote how Cryptomator works, not because it is not easy to use (it is very simple), but to give you an idea of ​​what you expect before using Cryptomator.

How to use Cryptomator to encrypt your cloud storage data on the desktop

When you run Cryptomator for the first time, you will notice that its user interface is very simple, with only 3 buttons-one for adding a file library, one for deleting an existing file library, and a settings button (unless you modify any settings, Otherwise unless you want to use WebDAV (and specify other WebDAV schemes or ports), enable debug mode or enable/disable update checking.
If possible, use the default volume type-FUSE on Mac and Linux, and Dokany on Windows.
To get started, click + Button and select Create New Vault:How to use cryptomator

Now browse to find your cloud storage provider folder (eg Dropbox folder), enter the name of the new vault, and click Save:How to use cryptomator

To be able to sync data, make sure to select a folder in Dropbox, MEGA, ownCloud, or any cloud storage you use.
Now, enter a passphrase for the new encrypted vault (make sure you don’t forget it, because you can’t recover data without this passphrase), then click Create Vault Button:How to use cryptomator to create libraries

To open the encrypted vault, enter the password and click Unlock Vault…:How to use cryptomator to unlock vault

…, a new window of the default file manager will open, pointing to the safe location of Cryptomator:cryptomator webdav nautilus

Place all files to be encrypted in the cloud storage at this FUSE/WebDAV location (depending on whether you are using FUSE or WebDAV in the settings of Cryptomator). In the future, this is how you will be able to access files without encryption.
If you check the files in the cloud storage, you will find that they are encrypted.
This is the final result on my system:cryptomator encrypted and unencrypted

On the left side of the screen, you can see the contents of the newly created encrypted vault named “crypt”, which is located in the My Dropbox folder. On the right side of the screen, there is the WevDAV/FUSE volume created by Cryptomator, which is installed in the Nautilus file manager and contains the unencrypted Documents folder. The left and right folders have the same files, the difference is that my Dropbox folder contains only encrypted files (left), and I can easily access those files that are not encrypted (right) from the file manager.
You can also check the official Cryptomator English desktop User manual.

Download Cryptomator

Update: In Cryptomator version 1.4.0, the download page provides AppImage binaries for Linux instead of DEB or RPM packages. There is also an Ubuntu/Linux Mint PPA, and an Aur package.
Cryptomator JAR files can also be used in the following locations: GitHub, But for security reasons, it is not recommended for inexperienced users.