A Rensselaer Polytechnic Institute computer science professor hopes to develop mathematical models that can uncover structure within the scattershot traffic of online public forums.

Trying to monitor the sea of traffic on all the chat channels would be like assigning a police officer to listen in on every conversation on the sidewalk — virtually impossible.

Instead of rummaging through megabytes of messages, RPI professor Bulent Yener will use mathematical models in search of patterns in the chatter. Downloading data from selected chat rooms, Yener will track the times that messages were sent, creating a statistical profile of the traffic.

If, for instance, RatBoi and bowler1 consistently send messages within seconds of each other in a crowded chat room, you could infer that they were speaking to one another amid the "noise" of the chat room.

"For us, the challenge is to be able to determine, without reading the messages, who is talking to whom," Yener said.

In search of "hidden communities," Yener also wants to check messages for certain keywords that could reveal something about what's being discussed in groups.
Security officials know al-Qaida and other terrorist groups use the Internet for everything from propaganda to offering tips on kidnapping. But it's not clear if terrorists rely much on chat rooms for planning and coordination.

Michael Vatis, founding director of the National Infrastructure Protection Center and now a consultant, said he had heard of terrorists using chat rooms, which he said offer some security as long as code phrases are used. Other cybersecurity experts doubted chat rooms' usefulness to terrorists given the other current options, from Web mail to hiding messages on designated Web pages that can only be seen by those who know where to look.