Email (preferred method)
For professional contacts, the preffered means still is email:
firstname.name@ens-rennes.fr encrypted if possible (with my
PGP key (F6BB 7666 62E7 D433 F7EE 159E C5C8 EDD1 25FB FD78)).
Instant Messaging Systems
I’m also available on theese instant messaging systems (ordered by preferences) :