Installing sett on your local computer

The Secure Encryption and Transfer Tool - or sett runs on all major operating systems. Please refer to the relevant section below depending on your operating system. sett requires two open source dependencies to be installed:

Using sett also requires users to have:

Installing dependencies

Installing dependencies on Windows

  1. Download the installer for the latest python 3 version from

  2. Run the downloaded installer file. In the installation wizard, make sure to select the Add Python to PATH option, as shown in the figure below.

  3. Download the latest version of GPG for windows (gpg4win) from

  4. Run the installer and accept all default settings (keep clicking “next”). At the end of the installation, a prompt might ask to to reboot the operating system to complete the install.

  5. Reboot your machine.

Installing dependencies on Linux

Python 3 and GPG can be installed from most Linux distributions’ software repositories. Here are commands for some of the most popular distributions:

  • Ubuntu, Debian: sudo apt-get install python3 python3-pip gnupg2
  • Fedora: sudo dnf install python3 python3-pip gnupg2
  • CentOS 7: sudo yum install python36 python36-pip gnupg2

Installing dependencies on Mac OS

In most cases, Python will be pre-installed on Mac OS systems. To check whether it’s installed or not, go to Applications > Utilities and click on Terminal. Alternatively, click command + spacebar on the keyboard, type terminal, and then click Enter.

A terminal window should now have opened. To find out which version of Python is installed, use the following commands:

# Check version of default python:
$ python --version
Python 2.7.16

# Check whether python3 is installed:
$ python3 --version
Python 3.X.X

Installing Python 3.8 and GnuPG: the easiest way to install python 3 (if needed) and GnuPG is using Homebrew - Instructions to install Homebrew can be found on its website. Note that a prerequisite for Homebrew is Apple’s xcode tools (xcode-select --install). With Homebrew available on your system, installing Python 3 and GnuPG is now a one-liner:

$ brew install python3 gpg

Installing sett


On some older operating systems (e.g. CentOS 7) sett-gui might not run due to the outdated system libraries. In such cases it is necessary to run pip install sett[legacy] instead of pip install sett (see the instructions below).


If you encounter any error during the installation or when trying to start sett, please have a look at the FAQ section to see whether your problem does already have an answer.

Installing sett on Windows

  1. Start a Windows shell by pressing the windows key, then type cmd on your keyboard and press enter.

  2. In the Windows shell, run the following command: pip install sett. If you are accessing the internet via a proxy, please refer to this section for further instructions.

  3. To check that sett has been correctly installed, try to type: sett --help in the terminal. The sett help should be displayed.

  4. To start the sett application in graphical mode, an executable can be found under C:\Users\<user name>\AppData\Local\Programs\Python\Python38\Scripts\sett-gui.exe.

    Note that to navigate to this location using the Windows explorer, you might have to enable show hidden files in the Windows explorer menu. Alternatively you can copy/paste C:\Users\<user name>\AppData\Local\Programs\Python\Python38\Scripts in the Windows explorer bar.

    For convenience, a shortcut to sett can be added to the Windows start menu: right-click on the sett-gui.exe file, then select Pin to Start. sett can now be run directly from the Windows start menu.


    Alternatively, sett-gui is also available by typing sett-gui in the Windows terminal.

Installing sett on Linux

With python 3 installed on your machine, the sett application can be installed by typing the following command in the terminal:

pip install --user sett

If you are accessing the internet via a proxy, please refer to this section for further instructions.


If you have both python 2 and python 3 installed on your machine, you may have to use pip3 instead of pip in the commands above.


Without the --user option, the above instruction will install the python scripts into system space, which will require administrator privileges. Adding --user, installs the module into a platform dependent user directory (e.g. ~/.local/bin/ in the case of Linux).

To check that sett has been correctly installed, type sett --help in the terminal. The sett help should be displayed. To start the app in graphical mode, type sett-gui in the terminal.

Installing sett on Mac OS

Follow the same installation instructions as found in the Linux section above.

If you experience SSL certification error messages when running sett, such as:

certificate verify failed: unable to get local issuer certificate.


Could not connect to pypi repository to query the latest version.

you will need to execute the file Install Certificates.command, found in your Python 3.X application directory. Typically the file is located in ~/Applications/Python 3.X/Install Certificates.command.


In case of a system wide python installation, the Install Certificates.command file will be located in /Applications/Python 3.X/Install Certificates.command.

In this scenario, running the file will also require root privileges.

Installing sett in a Conda virtual environment [cross-platform]

The Conda package manager can be used to create a virtual, sandboxed, environment in which sett can then be installed:

conda create -y --name sett_venv --no-default-packages python=3.8
conda activate sett_venv
pip install sett

sett -h              # Display sett help to check it was properly installed.
sett-gui             # Start sett in graphical mode.
conda deactivate     # When you are done using sett, close the conda environment.

Removing the conda environment: to delete the Conda environment where sett is installed, the following command can be used:

conda env remove --name sett_venv

Change install location: by default, Conda installs the sett_venv environment into the user’s home directory. To specify an alternative location, replace --name sett_venv with --prefix /alternative/path/sett_venv, as shown in this example:

conda create -y --prefix /alternative/path/sett_venv --no-default-packages python=3.8
conda activate /alternative/path/sett_venv
conda env remove --prefix /alternative/path/sett_venv

Installing a specific version of sett

Specific versions of sett can be download from After having unpacked the downloaded file and changed the working directory into the root of the unpacked files, the installation can be done with the command:

pip install --user .

For proxy settings please refer to this section.

Updating sett

As only the latest version of sett is officially supported and guaranteed to work, it is strongly recommended to always keep your local installation of sett up-to-date.

In most cases, the following command can be used to upgrade sett:

pip install --upgrade --user sett

For proxy settings please refer to this section.


If you have both python 2 and python 3 installed on your machine, you may have to use pip3 instead of pip in the command above.

If you have installed sett in a Conda virtual environment, make sure the environment is activated before running the upgrade command.

If you have not installed sett yourself, please kindly ask your administrator to perform the upgrade for you.