In July 1998, a summer school in cryptology and data security was organized atthecomputersciencedepartmentofAarhusUniversity, Denmark.Thistook place as a part of a series of summer schools organized by the European Edu- tional Forum, an organizationconsisting of the researchcenters TUCS (Finland), IPA(Holland)andBRICS(Denmark, Aarhus).Thelocalorganizingcommittee consisted of Jan Camenisch, Janne Christensen, Ivan Damga? ard (chair), Karen Moller, andLouisSalvail.ThesummerschoolwassupportedbytheEuropean Union. Modern cryptology is an extremely fast growing ?eld and is of fundamental importance...