Web Single Sign-On (SSO) is a valuable point of attack because it provides access to multiple resources once a user has initially authenticated. Therefore, the security of Web SSO is crucial. In this context, the SAML-based Holder-of-Key (HoK) SSO Profile is a cryptographically strong authentication protocol that is used in highly critical scenarios. We show that HoK is susceptible to a previou...

We show that the strong approximation property (strong AP) (respectively, strong CAP) and the weak bounded approximation property (respectively, weak BCAP) are equivalent for every Banach space. This gives a negative answer to Oja’s conjecture. As a consequence, we show that each of the spaces c0 and `1 has a subspace which has the AP but fails to have the strong AP.

When using lower probabilities to model uncertainty about the value assumed by a variable, 2-monotonicity is an interesting property to satisfy, as it greatly facilitates further treatments (such as the computation of lower/upper expectation bounds). In this paper, we show that multivariate joint models induced from marginal ones by strong independence, epistemic independence or epistemic irrel...

In this article, we obtain an effectiveness result of strong openness property in L p L^p </inline-...