$ sudo apt-get update
$ sudo apt-get install libtasn1-6 

libtasn1-6 is installed in your system.

Make ensure the libtasn1-6 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libtasn1-6 *

You will get with libtasn1-6 package name, version, architecture and description in a table

libtasn1-6 package basic information: