In the latest in a string of <A HREF="http://www.eweek.com/article2/0,1895,1986823,00.asp?kc=ewnws071106dtx1k0000599">high-profile data disclosures,</A> the brokerage services group of ADP (Automatic Data Processing) last week said "an unauthorized party impersonated officers" at an undisclosed number of public companies to obtain investor information between November 2005 and February 2006. The company, based in Roseland, N.J., did not say how many companies or investors were affected.