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The advent of new Smart Grid applications such as electric vehicles and renewable energy sources are imposing challenging requirements on the stability and operation of the grid. This challenge is critical in the areas of supply-demand balance and power quality assurance. To address this challenge, phasor measurement units (PMUs) are being deployed to monitor grid operations. A major impediment to the widespread use of this PMU technology is a lack of secure, scalable, and resilient data sharing infrastructure. Applying information-centric networking concepts we have designed GridDataBus (GDB), a secure data sharing bus. Through evaluation, we show the scalability and performance of GDB in terms of data access latency.