Auflistung nach Autor:in "Preneel, Bart"
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- KonferenzbeitragApplications of multivariate quadratic public key systems(Sicherheit 2005, Sicherheit – Schutz und Zuverlässigkeit, 2005) Wolf, Christopher; Preneel, BartIn this article, we investigate the class of multivariate quadratic (MQ) public key systems. These systems are becoming a serious alternative to RSA or ECC based systems. After introducing the main ideas and sketching some relevant systems, we deal with the advantages and disadvantages of these kinds of schemes. Based on our observations, we determine application domains in which MQ-schemes have advantages over RSA or ECC. We concentrate on product activation keys, electronic stamps and fast one-way functions.
- KonferenzbeitragThe belgian electronic identity card (overview)(Sicherheit 2006, Sicherheit – Schutz und Zuverlässigkeit, 2006) Cock, Danny de; Wolf, Christopher; Preneel, Bart
- KonferenzbeitragCross-Context Delegation through Identity Federation(BIOSIG 2008: Biometrics and Electronic Signatures, 2008) Peeters, Roel; Simoens, Koen; Cock, Danny de; Preneel, BartWe present in this paper a basic scheme for delegation in a federated setting and two more advanced schemes, transferable and corporated delegation. By transfer- able delegation delegatees are able to delegate the received privileged actions further to someone else. Corporate delegation is delegation within a business context. Our schemes are generic and user-centric. We elaborate on the different procedures to is- sue, accept and revoke mandates in these schemes. Different variations are discussed and their impact on the corresponding procedures is evaluated. For the basic scheme of delegation mandates are used, for more advanced schemes, as the complexity in- creases, use of delegation assertions is proposed.