Study Finds Web Antifraud Measure Ineffective
Published: February 5, 2007 New York Times
1. Internet security experts have long known that simple passwords do not fully defend online bank accounts from determined fraud artists. Now a study suggests that a popular secondary security measure provides little additional protection.
2.The study, produced jointly by researchers at Harvard and the Massachusetts Institute of Technology, looked at a technology called site-authentication images. In the system, currently used by financial institutions like Bank of America, ING Direct and Vanguard, online banking customers are asked to select an image, like a dog or chess piece, that they will see every time they log in to their account.
3.The idea is that if customers do not see their image, they could be at a fraudulent Web site, dummied up to look like their bank’s, and should not enter their passwords.
4.The Harvard and M.I.T. researchers tested that hypothesis. In October, they brought 67 Bank of America customers in the Boston area into a controlled environment and asked them to conduct routine online banking activities, like looking up account balances. But the researchers had secretly withdrawn the images.
5.Of 60 participants who got that far into the study and whose results could be verified, 58 entered passwords anyway. Only two chose not to log on, citing security concerns.
6.“The premise is that site-authentication images increase security because customers will not enter their passwords if they do not see the correct image,” said Stuart Schechter, a computer scientist at the M.I.T. Lincoln Laboratory. “From the study we learned that the premise is right less than 10 percent of the time.”
7.He added: “If a bank were to ask me if they should deploy it, I would say no, wait for something better,” he said.
8.The system has some high-power supporters in the financial service