Blogging is also being gagged by marketing, public relations and corporate communications staff.

Frost & Sullivan security analyst, James Turner, said blogging now is seen as "making a grab for the microphone" and is a classic example of technology moving quicker than policy.

"Blogging is the classic example of needing security policies and employment contracts stating specifically what an employee is entitled to do - and unless you are a spokesperson for the company you have no business writing a blog," Turner said.

"I see a lot of US-based CEOs doing corporate blogs, and they do give tidbits of internal happenings, but you have to keep in mind everything they post has come through the public relations department and it will never be spontaneous; it is designed to build the cult of personality - even the stuff on internal company blogs is designed to be seen in a positive light.

"Companies are putting out blogs with their own spin on things, individuals are doing their own blog."