Disable keyboard input using weston.ini?

I want to disable keyboard input in weston. Do you know which sheet to add?

it's /usr/share/weston/weston.ini file

# weston.ini

[core]
shell=desktop-shell.so
require-input=false

[shell]
background-image=/usr/share/weston/background.png
background-color=0x00ffffff
panel-color=0x00ffffff
panel-location=none
locking=true
animation=none
#binding-modifier=ctrl
#num-workspaces=6

#lockscreen-icon=/usr/share/icons/gnome/256x256/actions/lock.png
#lockscreen=/usr/share/backgrounds/gnome/Garden.jpg
#homescreen=/usr/share/weston/background.png
#animation=zoom