HOW "ZERO-KNOWLEDGE" ENCRYPTION WORKS

Gatxan Cloud gives to the user the option to select which folders want to encrypt by generating their own encryption keys using an open source program/app previously installed on their device. This system allows the user to work with the encrypted information in a transparent way, because the program automatically and autonomously performs the encryption and decryption of the files. Only when the information has already been encrypted in the user's terminal is when it is uploaded to the Gatxan servers.
This is known as "Zero-Knowledge" ("Z-K") encryption: it is the User who, through their own tools, generates their own encryption keys and, therefore, only he will know them and no one else will be able to access the encrypted files in this way.

THE ENCRYPTION KEYS MUST BE GENERATED DIRECTLY BY THE USER

Note, however, that the "Zero-knowledge" technology implicitly requires a condition: that the encryption keys are generated directly by the User. In order for this condition to be met, encryption must necessarily and exclusively be done from the User’s own device, and the only way to be able to generate the encryption keys themselves is having previously installed a specific program to do it. Only with this installed program is it possible to specify which folders want to be encrypted.

This is the only way of anyone else do not have access to the decryption keys of files. That is why, by default, files uploaded to Gatxan Cloud without the user passing them through this process are NOT encrypted with the "Zero-knowledge" technology.

However, and in a strict application of Gatxan’s Privacy Policy, everything that is uploaded to our servers is encrypted from end to end by Gatxan to, in case of intrussion, avoid access to it. But this encryption is done automatically by our system, which means, obviously, that in Gatxan we have the decryption keys.

That is why, to apply the "Zero-knowledge" technology, it must be explicitly executed by the User. This will add one more layer of encryption (the default Gatxan Cloud encryption + the "Zero-Knowledge" encryption applied by the user) and it is with this second layer that it will be guaranteed that only the User has access to his data.

To do this "Zero-knowledge" encryption, Gatxan provides the User with the open source client-program so that he can be installed on his devices and thus be able to apply the "Zero-knowledge" encryption to the folders he wishes. Only in this way can encryption become "Zero-Knowledge".

Below we detail the steps to follow to obtain and install on any device the necessary program-client for the "Zero-knowledge" encryption, as well as its installation and use guides.

INFORMATION AND ZERO-KNOWLEDGE ENCHRYPTION PROGRAM DOWNLOAD

Information about the program

The program that Gatxan Cloud uses is developed and distributed by NEXTCLOUD GmbH under license GNU General Public License), which means that, like all software we work with in Gatxan, this program is open source and free.

Both, the computer program and the mobile application, are very lightweight, require very little space in the devices, and are very intuitive so that neither its installation nor its use do not suppose any difficulty for the User.

Program download

This NextCloud program is available for the majority operating systems (OS), both for Linux, Windows and Mac, and for Android and iOS.
Below you will find the links to download the program from our servers, ready to install it:

"Z-K" GATXAN CLOUD APP FOR COMPUTER

LINUX
WINDOWS
MAC

"Z-K" GATXAN CLOUD APP FOR MOBILE DEVICE

If you prefer, you can download the same program from the official developer page, NextCloud. Just keep in mind that you will have to specify the server you want to connect to (gatxan.cloud).

Both in Control Panel of the Administrative Account, and within the documentation itself of Gatxan Cloud you will find the installation and use guides of the program for the "Zero-knowledge" encryption.