  We propose a variant of the well-known AONT-RS scheme for dispersed storage
systems. The novelty consists in replacing the Reed-Solomon code with rateless
Luby transform codes. The resulting system, named AONT-LT, is able to improve
the performance by dispersing the data over an arbitrarily large number of
storage nodes while ensuring limited complexity. The proposed solution is
particularly suitable in the case of cooperative storage systems. It is shown
that while the AONT-RS scheme requires the adoption of fragmentation for
achieving widespread distribution, thus penalizing the performance, the new
AONT-LT scheme can exploit variable length codes which allow to achieve very
good performance and scalability.
