If you intend to use intradisk as a WLAN client e.g. for recording of internet radio stations just:
All Intradisk servers offer enhanced crypto with WPA, WPA-PSK, WPA2 and WPA2-PSK as well as the old WEP encryption algorithm. WEP is offered, because some clients are still not able to connect with the newest security authentication mechanisms.
If this is still not enough security, you also have the additional choice to connect all intradisk by connection via the free OpenSSH suite programs using hard encrytion protocolls like SSH, SFTP or SCP to tranfer files from or to your intradisk. These high encrytion protocolls are intended for accessing your intradisk over the internet by tunneling through the standard SSH port of most firewalls.