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Work package 3: Middleware & Middleware Security
The general task of middleware platforms is to provide a certain level of abstraction that simplifies the development of applications for an application and/or device domain. The goal of WP3 is to investigate means that allow to provide middleware like security focus functionality for wireless sensor networks. The very constraint capabilities of the sensor node and the expected lifetime of several years are making this task very challenging. The major challenges that we are addressing are:
The realisation of secure services: here basic as well as complex services have to be investigated. There are a lot of open issues even for basic services e.g. secure localization methods. Also complex services such as secure robust data storage are still not completely understood and need them selves support form also not yet available secure basic services. Thus, we will analyse, invent, implement and verify these middleware services.
The configuration of the basic and complex services according to the needs of a certain application as well as to the sensor node features. The challenge here is to ensure the level of security required by the application while minimizing the resources (memory, processing and battery power). This optimization can be done on per service level in a very first step. Thereafter a verification of the security of the compilation of the selected modules has to be done. Before the first roll out of the WSN sufficient resources are available to complete these tasks, since they can be executed on fully equipped PCs or workstations. But if the application or security requirements change while the WSN is operating these tasks have to be done at least up to a certain level on the sensor nodes themselves as well as in a distributed manner. The figure below shows a draft sketch of the configuration process.
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Selection of basic and complex security services according to application requirements and sensor node features |
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