Cupertino, Calif.-based security giant Symantec Corp. surveyed 400 CIOs on their organizations’ IM security policy, and found that 57% of them had no security or availability policies for their IM systems. The survey also found that only 22% of organizations archive their employees’ IM messages, a serious oversight that can lead to the leakage of confidential data or other sensitive information. The results of the survey are especially surprising considering that the number of IM threats increased by more than 1,600% from 2004 to 2005, according to statistics gathered by Symantec. Last year the vendor recorded a total of 2,400 unique IM threats.