dnscrypt-proxy software package provides Tool for securing communications between a client and a DNS resolver, 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 dnscrypt-proxy
dnscrypt-proxy is installed in your system.
Make ensure the dnscrypt-proxy package were installed using the commands given below,
$ sudo dpkg-query -l | grep dnscrypt-proxy *
You will get with dnscrypt-proxy package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | dnscrypt-proxy |
| Version | 1.6.1-1 |
| Description | Tool for securing communications between a client and a DNS resolver |
| Sub Section | Net |