Although very developed in many sectors
(databases, filesystems), access control schemes are still
somewhat elusive when it comes to wireless sensor networks.
However, it is clear that many WSN systems--such
as healthcare and automotive ones--need a controlled
access to data that sensor nodes produce, given its high
sensitivity. Enforcing access control in wireless sensor
networks is a particularly difficult task due to the limited
computational capacity of wireless sensor nodes. In this
paper we present a full-fledged access control scheme for
wireless sensor data. We enforce access control through
data encryption, thus embedding access control in sensor
data units. We also propose a lightweight key generation