Some IT managers are concerned that IM can send files that are not virus-checked past corporate firewalls , creating a threat to network security. Instant messaging (IM) is taking off in companies but self-installed consumer versions of software that allows this type of communication are posing a “rampant security risk” on networks. Already some companies see IM as a time-wasting technology — as was the case when email, Web access and even the telephone were first put on workers’ desks — but the latest warning, levelled by Blue Coat Systems, is based on three key factors. Full Story