Lars Ewers Wolfgang Kubbilun Lijun Liao Jörg Schwenk Secure XMaiL or How to Get Rid of Legacy Code in Secure E-Mail Applications. 291-300 2005 conf/cms/2005 Communications and Multimedia Security http://dx.doi.org/10.1007/11552055_39 db/conf/cms/cms2005.html#EwersKLS05