Install libcrypt-dh-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libcrypt-dh-perl
Description:
Diffie-Hellman key exchange system implemented in Perl
Diffie-Hellman is an algorithm by which two parties can agree on a shared secret key, known only to them. The secret is negotiated over an insecure network without the two parties ever passing the actual shared secret, or their private keys, between them.
Homepage: http://search.cpan.org/dist/Crypt-DH/
Version: 0.07-1
Section: universe/perl