How do you set an encryption key in debian?

I was able to use iwconfig to get my wireless working (iwconfig eth0 enc <my key>), but it loses it on reboot. How can I add it permanently to the network config?

Thanks.

Maybe set up cron to do it at every boot, or add it to the boot squence.

man interfaces
man wireless

Those should help you with network config questions

cat interfaces
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface
# automatically added when upgrading



auto lo
iface lo inet loopback
auto ath0
iface ath0 inet dhcp
iwconfig ath0 channel 9
pre-up /usr/sbin/wpa_supplicant -Dmadwifi -iath0 -c/etc/network/wpa_supplicant.conf -B

mine is set up for WPA-PSK / WPA2-PSK TKIP and AES

but you get an idea on how it should be setup