  Off-grid networks are recently emerging as a solution to connect the
unconnected or provide alternative services to networks of possibly untrusted
participants. The systems currently used, however, exhibit limitations due to
their centralized nature and thus prove inadequate to secure trust. Blockchain
technology can be the tool that will enable trust and transparency in such
networks. In this paper, we introduce a platform for secure and
privacy-respecting decentralized data sharing among untrusted participants in
off-grid networks. The proposed architecture realizes this goal via the
integration of existing blockchain frameworks (Hyperledger Fabric, Indy, Aries)
with an off-grid network device and a distributed file system. We evaluate the
proposed platform through experiments and show results for its throughput and
latency, which indicate its adequate performance for supporting off-grid
decentralized applications.
