Technology Would Help Detect Terrorists Before They Strike. BUFFALO, N.Y. -- Are you a terrorist?
You’re in a desert walking along in the sand when all of the sudden you look down, and you see a tortoise, it’s crawling toward you. You reach down, you flip the tortoise over on its back. The tortoise lays on its back, its belly baking in the hot sun, beating its legs trying to turn itself over, but it can’t, not without your help. But you’re not helping. Why is that?
You’re in a desert walking along in the sand when all of the sudden you look down, and you see a tortoise, it’s crawling toward you. You reach down, you flip the tortoise over on its back. The tortoise lays on its back, its belly baking in the hot sun, beating its legs trying to turn itself over, but it can’t, not without your help. But you’re not helping. Why is that?
Airport screeners, customs agents, police officers and members of the military who silently pose that question to people every day, may soon have much more than intuition to depend on to determine the answer.
Computer and behavioral scientists at the University at Buffalo are developing automated systems that track faces, voices, bodies and other biometrics against scientifically tested behavioral indicators to provide a numerical score of the likelihood that an individual may be about to commit a terrorist act.
"The goal is to identify the perpetrator in a security setting before he or she has the chance to carry out the attack," said Venu Govindaraju, Ph.D., professor of computer science and engineering in the UB School of Engineering and Applied Sciences. Govindaraju is co-principal investigator on the project with Mark G. Frank, Ph.D., associate professor of communication in the UB College of Arts and Sciences.
The project, recently awarded an $800,000 grant by the National Science Foundation, will focus on developing in real-time an accurate baseline of indicators specific to an individual during extensive interrogations while also providing real-time clues during faster, routine security screenings.
"We are developing a prototype that examines a video in a number of different security settings, automatically producing a single, integrated score of malfeasance likelihood," he said.
A key advantage of the UB system is that it will incorporate machine learning capabilities, which will allow it to "learn" from its subjects during the course of a 20-minute interview.
That's critical, Govindaraju said, because behavioral science research has repeatedly demonstrated that many behavioral clues to deceit are person-specific.
"As soon as a new person comes in for an interrogation, our program will start tracking his or her behaviors, and start computing a baseline for that individual 'on the fly'," he said.
The researchers caution that no technology, no matter how precise, is a substitute for human judgment.
"No behavior always guarantees that someone is lying, but behaviors do predict emotions or thinking and that can help the security officer decide who to watch more carefully," said Frank.
He noted that individuals often are randomly screened at security checkpoints in airports or at border crossings.
"Random screening is fair, but is it effective?" asked Frank. "The question is, what do you base your decision on -- a random selection, your gut reaction or science? We believe science is a better basis and we hope our system will provide that edge to security personnel."
Govindaraju added that the UB system also would avoid some of the pitfalls that hamper a human screener's effectiveness.
"Human screeners have fatigue and bias, but the machine does not blink," he said.
The UB project is designed to solve one of the more challenging problems in developing accurate security systems -- fusing information from several biometrics, such as faces, voices and bodies.
"No single biometric is suited for all applications," said Govindaraju, who also is founder and director of UB's Center for Unified Biometrics and Sensors. "Here at CUBS, we take a unique approach to developing technologies that combine and 'tune' different biometrics to fit specific needs. In this project, we are focusing on how to analyze different behaviors and come up with a single malfeasance indicator."
The UB project is among the first to involve computer scientists and behavioral scientists working together to develop more accurate detection systems based on research from each field.
Both researchers have spent their careers studying complementary areas. Since completing his doctoral dissertation on using computational tools to do facial recognition, Govindaraju has focused on problems in pattern recognition and artificial intelligence. Since founding CUBS in 2003, he has worked on a broad range of biometric technologies and devices.
Frank, a social psychologist, has spent his career conducting research on human nonverbal communication that strongly suggests whether or not an individual is feeling emotions or telling the truth. He founded the Communication Science Center at UB in 2005 and his work, recognized and utilized by security officials around the world, now provides important information for UB computer scientists.
Frank and Govindaraju began working together partly as a result of UB 2020, the university's strategic plan, which emphasizes strengthening interdisciplinary research.
"What I like about working with Venu and his team at CUBS is that they are creating new algorithms that hold the exciting possibility of revealing information and patterns that will help us spot potential bad guys," said Frank. "We expect that there will be an advantage to combining the behavioral understanding of people with algorithm development to make better predictions."
They expect to have a working prototype of the full system within a few years.
In addition to NSF, the researchers have received funding from the Department of Defense and the UB Office of the Vice President for Research.
The grant builds on previous work by CUBS, which has attracted more than $5 million in federal and industry funding in fewer than five years. The center develops new methods for customizing homeland security and other devices that use data from physical biometrics, such as fingerprints, hand geometry and iris scans; behavioral biometrics, such as signature, voiceprint and gait, and chemical biometrics, such as DNA and body odor.
The current research also has its roots in previous work examining nonverbal communication at the CSC, which has attracted more than $2 million in federal funding since its founding in 2005.
The University at Buffalo is a premier research-intensive public university, the largest and most comprehensive campus in the State University of New York. UB's more than 28,000 students pursue their academic interests through more than 300 undergraduate, graduate and professional degree programs. Founded in 1846, the University at Buffalo is a member of the Association of American Universities.
Contact: Ellen Goldbaum goldbaum@buffalo.edu 716-645-5000 x1415 University at Buffalo
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