Résumé
Cosmic dark matter may be in form of superweakly interacting elementary particles such as the gravitino or the axino. Direkt dark matter searches are not capable of discovering such dark matter. However, gravitinos and axinos are often produced as warm dark matter leaving a signature and the primordial power spectrum. Moreover, their production often entails a perturbation of the epoch of Big Bang nucleosynthesis, thus leaving a signature in the light element abundances. In this talk both of these potential signatures are discussed.