  With future wide and deep cosmological sky surveys, a large number of
gravitationally lensed, multiply imaged systems will be found. In addition to
multiply imaged galaxies and quasars, sources will include transient events
like supernovae and gamma ray bursts in which case very accurate time delay
measurements are possible. Also, large numbers of systems with several lensed
sources behind a single lens will be observed. In this paper, we review and
compare different possibilities of using future strong lensing data to probe
lens matter distributions and to determine the Hubble parameter and the matter
density of the universe. Specifically, we investigate the possibility to break
the well-known degeneracy between dark matter halo profiles and the Hubble
parameter using observed flux ratios. We also investigate how strong lensing
can provide useful constraints on the matter density of the universe
independently of the flux ratios and other cosmological probes.
