Sensor Network Security - Networked Embedded Systems - page 236

be too resource consuming. his chapter has reviewed basic considerations on protection against DoS
and attacks on routing, and has given an overview of first approaches proposed thus far. For ensuring
confidentiality and integrity of data, the SNEP and μ TESLA protocols were discussed, and consid-
ering key management the LEAP protocol, as well as probabilistic key management, and its many
variations have been reviewed. Designing security functions suitable for the specific communication
patterns in sensor networks turns out to be rather difficult. Regarding data origin authentication and
integrity, there seem to be some principle obstacles in achieving the goals of energy saving data aggre-
gation and security at the same time [Wag]. Concerning confidentiality of sensor readings to be
aggregated on their way toward the base station, a number of approaches for CDA based on privacy
homomorphisms [RAD] have been presented and discussed.

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