In what is believed to be the first experiment of its kind at a U.S. school, students and staff members at Pennsylvania’s Slippery Rock University soon will be able to use their cell phones to make payments at locations on campus, as well as with participating merchants in the surrounding community, by attaching a small radio-frequency identification (RFID) token to their phones.

The RFID tokens can be attached, for example, to the inside of a cell-phone’s battery cover. When a token is held up to an RFID receiver, the receiver captures the student’s or staff member’s ID number from the device....

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