Easy two-factor solution for users with smartphones. Google Authenticator and Perl: https://blog.darkpan.com/article/6/Perl-and-Google-Authenticator.html https://debian-administration.org/article/729/Implementing_two_factor_authentication_with_perl https://github.com/j256/perl-two-factor-auth
*** This bug has been marked as a duplicate of bug 28786 ***