Guangjun Ji

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With the development of mobile networks and positioning technologies, location based service is becoming more and more popular, such as location-aware emergency response, advertisement, and car navigation system etc. However, while people enjoy more convenient life provided by location based services, their location privacy may leak. To tackle this problem,(More)
With the popularity of smart portable devices and advances in wireless technologies, mobile marketing increases quickly. Among various methods, short message is regarded as the most efficient mode. While mobile advertising enhances communication with consumers, the messages without a required permission cause privacy violations. So, how to simultaneously(More)
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