Event
UMIACS LTS Seminar: Min Wu, "Exploring Power Network Signatures for Information Forensics"
Thursday, March 5, 2015
2:00 p.m.
LTS Auditorium, 8080 Greenmeade Drive, College Park
UMIACS LTS Seminar
Exploring Power Network Signatures for Information Forensics
Min Wu
Professor, UMIACS and ECE
Affiliate Faculty, ISR
Abstract
Osama Bin Laden's video propaganda prompted many inforamtion forensic questions. Given a video under question, when and where was it shot? Was the audio captured together at the same time and location as the visual? Similar questions about time, location and the integrity of multimedia and other sensor recordings are important to provide evidence and trust in crime solving, journalism and other informational operations.
An emerging line of research exploits novel signatures induced by the power network. An example is the small random fluctuations of the electric frequency known as Electric Network Frequency (ENF), owing to the dynamic control process to match the electricity supplies with the demands in the grid. These environmental signatures reflect the attributes and conditions of the power grid and become naturally embedded into various types of sensing signals. They carry time and location information and may facilitate integrity verification of the primary sensing data.
This talk will summarize recent information forensics research on ENF carried out by the UMD Media and Security Team, and will discuss ongoing and open research issues in and beyond security applications.
