Apple's security engineering team had been planning a presentation at the security conference, which runs through the end of this week at Caesar's Palace in Las Vegas.
Such an event would have marked the first time Apple had made an official presentation at the conference.
But according to a conference spokesperson, one of the panelists told conference organizers that Apple's security engineering team had some problems they wouldn't be able to solve in time. So the Apple presentation is not happening.
Apple, as is its habit when questioned about security issues, did not respond to requests for comment.
But a report in Computerworld suggests that the cancellation of the talk has more to do with image management than workload management.
Dark Reading, a sister Web site to InformationWeek, quoted Black Hat Director Jeff Moss as saying that Apple pulled its session virtually at the last minute.
"Marketing got wind of it, and nobody at Apple is ever allowed to speak publicly about anything without marketing approval," Moss said in the story.
Another Apple-related event also was canceled, though technically it couldn't have been canceled because it was never officially accepted. Security researcher Charles Edge withdrew a proposed talk on an undisclosed vulnerability in Apple's FileVault file encryption software for Mac OS X.
According to a Black Hat conference spokesperson, Edge's proposed talk had not yet been accepted when it was withdrawn.
The Washington Postreported that Edge withdrew from consideration because he had signed a confidentiality agreement with Apple. It's not immediately clear whether Edge remembered his contractual obligations at the last minute or whether he had his memory jogged by a reminder from Apple about the legal consequences of a contractual breach.
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