Cisco Systems and Internet Security Systems cancelled a presentation at the annual Black Hat security conference in Las Vegas last week because it would have disclosed a security flaw in Cisco’s flagship router products. In response to the cancellation, the presenter, Michael Lynn, an employee of ISS, resigned from the company, gave his presentation in defiance, and announced to the audience that he was in the market for a job. Many serious programmers were surprised and disappointed by Cisco’s attempt to silence Lynn. Cisco has not developed software that allows its routers to automatically download and install security patches.”]