"We were consistently concerned that data mining does not have demonstrated efficacy for fighting terrorists," said Ben Shneiderman, a University of Maryland computer science professor and one of the 21 committee members."
The report discusses the danger is relying on databases that are notorious for inaccuracies:
"The DHS has purchased at least parts of databases from ChoicePoint, LexisNexis and Axiom, says [Stephen] Fienberg, who also works in Carnegie Mellon's CyLab, the largest university-based cybersecurity institute in the U.S."
"Merging data from various databases inevitably leads to mistakes. But government counterterrorism programs don't always take into account where its information comes from or whether it might not be true."It's basically a problem where government programs really are not focused on the data sources and the correctness, but rather the use of the data they have at hand," Fienberg said."
Data Mining Failing To Hit Mother Lode In Finding Terrorists