I can confirm that for my pcmcia prism2 based card, i use hostap_cs driver with wpa_supplicant successfully to have wpa encrypted wireless. I had to blacklist manually orinoco driver, because it's not done automatically by hostap-utils package (see malone #41652)
-- blacklist orinoco_pci https://launchpad.net/bugs/36718 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs