Accountability means that those who break the law, lie to Congress or deceive the American people are held accountable. The NSA has gone rogue, and while it's probably not possible to prosecute people for what they did under the enormous veil of secrecy it currently enjoys, we need to make it clear that this behavior will not be tolerated in the future. Accountability also means voting, which means voters need to know what our leaders are doing in our name.
Since the Snowden documents became public, I have been receiving e-mails from people seeking advice on whom to trust. As a security and privacy expert, I'm expected to know which companies protect their users' privacy and which encryption programs the NSA can't break. The truth is, I have no idea. No one outside the classified government world does. I tell people that they have no choice but to decide whom they trust and to then trust them as a matter of faith. It's a lousy answer, but until our government starts down the path of regaining our trust, it's the only thing we can do.