  Mobile payment system in a disaster area have the potential to provide
electronic transactions for people purchasing recovery goods like foodstuffs,
clothes, and medicine. Conversely, to enable transactions in a disaster area,
current payment systems need communication infrastructures (such as wired
networks and cellular networks) which may be ruined during such disasters as
large-scale earthquakes and flooding and thus cannot be depended on in a
disaster area. In this paper, we introduce a new mobile payment system
utilizing infrastructureless MANETs to enable transactions that permit users to
shop in disaster areas. Specifically, we introduce an endorsement-based
mechanism to provide payment guarantees for a customer-to-merchant transaction
and a multilevel endorsement mechanism with a lightweight scheme based on Bloom
filter and Merkle tree to reduce communication overheads. Our mobile payment
system achieves secure transaction by adopting various schemes such as
location-based mutual monitoring scheme and blind signature, while our newly
introduce event chain mechanism prevents double spending attacks. As validated
by simulations, the proposed mobile payment system is useful in a disaster
area, achieving high transaction completion ratio, 65% - 90% for all scenario
tested, and is storage-efficient for mobile devices with an overall average of
7MB merchant message size.
