//www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged
* synchro de contacts/agenda/todolist thunder... * DNSSEC (partie resolver et partie signature de ses zones:
* http://techglimpse.com/dnssec-conf... nd/bind-keys/
* https://www.dns-oarc.net/oarc/services/dlvtest
* http://www.packetizer.com/peo
