A new technology allows surveillance cameras to send personalized messages to smartphones.
The system, developed by Purdue University, is called PHADE, and is a real-time, end-to-end system known as private human addressing. While traditional data transmission protocols need to first learn the destination’s IP or MAC address, the PHADE uses motion patterns as the address code for communication and the smartphone then locally makes its own decision on whether to accept the message.
The system uses a server to receive video streams from cameras to track people. The camera builds a packet by linking a message to the address code and broadcasts the packet. When the mobile device receives the package, it uses sensors to extract its owner’s behavior and follows the same transformation to derive a second address code. If the second address code matches with the address code in the message, the smartphone automatically delivers the message to its owner.
"Our technology enables public cameras to send customized messages to targets without any prior registration," said He Wang, an assistant professor in the Purdue Department of Computer Science. "Our system serves as a bridge to connect surveillance cameras and people and protects targets' privacy."
PHADE protects privacy by keeping the users’ personal sensing data within their smartphones and it transforms the raw features of the data to blur partial details.
The technology could be used at places such as a museum, where visitors can receive messages with information about the artifacts or exhibits they are viewing. PHADe could also be implemented in shopping malls to provide consumers with product information or coupons. Researchers said the technology could also be used in new store prototypes, such as Amazon Go, which uses phone technology instead of traditional checkout registers.
Another potential use for the technology is as an early warning system for high-crime or high-accident areas or to warn users about potential threats or changing weather.
The full research can be found on Purdue University’s web site.