CheckFree warns 5 million customers after hack

07.01.2009

CheckFree has deals to provide electronic bill payment services to banks such as and . It is not clear whether or not these banks were affected by the attack.

This kind of incident could also happen with fund transfer services, which are also frequently outsourced, Litan said. "Bank security is only a strong as its weakest link and the weakest links in banking are online payment and fund transfer [services]," Litan said.