@mastersthesis{EURECOM+1409, author = {Bussard, Laurent and Claessens, Joris and Crosta, Stefano and Roudier, Yves and Zugenmaier, Alf}, title = {Can we take this off-line? How to deal with credentials in federations without global connectivity}, year = {2004}, note = {© EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Research report RR-04-105, May 2004 and is available at :}, }