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Code dissemination in wireless sensor networks refers to the process of disseminating a new code image via wireless links to all sensor nodes after they are deployed. It is desirable and often necessary due to the need for, e.g., removing program bugs and adding new functionalities in a multi-task sensor network. A sound code dissemination scheme need be both loss-resilient and attack-resilient, which are crucial for sensor networks deployed in lossy and hostile environments. To the best of the authors' knowledge, no existing scheme simultaneously satisfies both requirements.
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