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The issue with balancing privacy and surveillance is that the wireless carriers are not interested in privacy, he said. "They've been providing wiretapping for 100 years. Apple may in the next year protect voice calls," he said, and said that the best hope for ending widespread government surveillance will be the makers of mobile operating systems like Apple and Google. Not all upcoming security innovation will be focused on that kind of privacy protection. Security researcher Brandon Wiley showed off at Defcon a protocol he calls Dust that can obfuscate different kinds of network traffic, with the end goal of preventing censorship. "I only make products about letting you say what you want to say anywhere in the world," such as content critical of governments, he said. Encryption can hide the specifics of the traffic, but some governments have figured out that they can simply block all encrypted traffic, he said. The Dust protocol would change that, he said, making it hard to tell the difference between encrypted and unencrypted traffic. It's hard to build encryption into pre-existing products, Wiley said. "I think people are going to make easy-to-use, encrypted apps, and that's going to be the future."

Companies could face severe consequences from their security experts, said Stamos, if the in-house experts find out that they've been lied to about providing government access to customer data. You could see "lots of resignations and maybe publicly," he said. "It wouldn't hurt their reputations to go out in a blaze of glory." Perhaps not surprisingly, Marlinspike sounded a hopeful call for non-destructive activism on Defcon's 21st anniversary. "As hackers, we don't have a lot of influence on policy. I hope that's something that we can focus our energy on," he said.