So far, Black Hat organizers have not been contacted or asked to cancel Paget's presentation, but lawyers representing Black Hat, which was purchased by CMP, are ready should that happen, Moss said.

"We're prepared for the worst," Moss said.

The incident between HID and IOActive recalls a over a presentation of a flaw in Cisco's IOS at a Black Hat event in Las Vegas.

In that incident, Cisco attorneys demanded that Lynn's presentation be torn out of the printed conference proceedings and that Lynn be blocked from giving his talk. Lynn ultimately resigned his position at Internet Security Systems Inc. (ISS) and gave the talk anyway, and even an FBI investigation of him.

Lynn now at Cisco competitor, Juniper Networks.