codecrypt software package provides post-quantum encryption and signing tool, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install codecrypt
codecrypt is installed in your system.
Make ensure the codecrypt package were installed using the commands given below,
$ sudo dpkg-query -l | grep codecrypt *
You will get with codecrypt package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | codecrypt |
| Version | 1.7.5-1 |
| Description | post-quantum encryption and signing tool |
| Sub Section | Utils |