LEXINGTON, Mass.--(BUSINESS WIRE)--Imprivata® (NYSE: IMPR), the healthcare IT security company, today announced a revised date for its fourth quarter and the full year ended December 31, 2014 conference call. Imprivata will now hold a conference call for investors on Tuesday, February 24 at 5:00 p.m. ET during which management will review highlights from the company's fourth quarter and year end 2014 results, its business outlook and other matters. The Company expects to issue the earnings rele