I added a Telegram poll in a private group with a yes/no option as a second factor for all my (ssh) servers (using session pam_exec.so /path/to/poll/binary). If

I added a Telegram poll in a private group with a yes/no option as a second factor for all my (ssh) servers (using session pam_exec.so /path/to/poll/binary). If my ssh key gets compromised, I can still deny ssh access. Unless my entire laptop gets stolen while running of course.