I've never met Dorothy Denning, so I hesitate to characterize her as a villainess. But certainly she's the only noted cryptographer I know of who's gone so far out on a limb to defend a position the vast majority of computer scientists, civil libertarians, and cryptographers scoff at. (And I don't just mean it is we libertarians and civil libertarians who are scoffing, I mean that nearly every noted expert who has carefully reviewed the various schemes to control crypto and to provide GAK has found them to be essentially unenforceable except via draconian police state methods, and maybe not even then.)
I believe that David Gelerntner, the professor of computer science at Yale University injured by a UNABOMBER bomb, is also a supporter of the Clipper chip. This may or may not be something that arose from the bombing. But I'm not sure how many cavaets and things he adds to his position. He may have changed it. But then he's not exactly a cryptographer. But, on the other side of the fence, I just passed a section in _Takedown_ where Shimomura and the FBI agents decide that the best place for the Clipper phones is "in the trunk." Apparently they don't communicate with regular phones so they were practically worthless. -Peter