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Broadcast authentication is a fundamental security service in distributed sensor networks. This paper presents a new sensor broadcast authentication scheme based on ?TESLA. ?TESLA is a broadcast authentication protocol whose scalability is limited by its unicast-based initial parameter distribution. The proposed scheme use double key chains to solve the problem to distribute the ?TESLA parameters...
A Content-Based Retrieval Architecture (COBRA) for picture archiving and communication systems (PACS) is introduced. COBRA improves the diagnosis, research, and training capabilities of PACS systems by adding retrieval by content features to those systems. COBRA is an open architecture based on widely used health care and technology standards. In addition to regular PACS components, COBRA includes...
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