EFS
http://www.atmarkit.co.jp/icd/root/31/11152331.html http://www.atmarkit.co.jp/fwin2k/special/winxp_over/winxp_over_15.html http://www.port139.co.jp/csir_efs.htm http://www.microsoft.com/resources/documentation/WindowsServ/2003/standard/proddocs/ja-jp/Default.asp?url=/resources/documentation/WindowsServ/2003/standard/proddocs/ja-jp/encrypt_howto_backup_certificate.asp http://www.st.rim.or.jp/~shio/csm/efs/