If you are using a cloud storage service like Google Drive, Dropbox, OneDrive, etc., you should be aware that your files are not encrypted by default. This means that the cloud provider is able to access and, in some cases, even share them with third parties. In case your cloud provider gets hacked, your files could also be exposed to the public.
To prevent this from happening, you can use a tool like Cryptomator to automatically encrypt your files before uploading them to the cloud.
How does it work?
Cryptomator is a free and open-source software that allows you to create an encrypted vault on your computer where you can store your files. Once you have added your files to the vault, Cryptomator will encrypt them using strong encryption algorithms (256 bit AES).
To be more clear, Cryptomator doesn’t upload your files. Your cloud provider application does:
You write files to the Cryptomator vault -> Cryptomator encrypts them and writes them in a folder which is synced up to your cloud provider -> Your cloud provider application uploads the encrypted files to the cloud.
When you want to access your files, you simply access them from your mounted vault and Cryptomator will automatically decrypt them for you…
You can find the rest of this post here: https://www.andreagrandi.it/posts/cryptomator-end-to-end-encrypt-files-in-cloud/