Ashton Kutcher Has Twitter Hacked at TED ConferenceAshton Kutcher's Twitter account has provided the world a great many things: odes to coffee sung with his stepdaughter, pictures of his unaging wife and now, a lesson on ensuring the security of your server.

While attending the TED 2011 'The Rediscovery of Wonder' conference, at which notable intellectuals and artists, including Bill Gates, Bobby McFerrin, David Brooks and Julie Taymor are all scheduled to speak, Kutcher got a less-than-pleasant surprise when he found his Twitter had been hacked.

Kutcher's nearly 6.4 million followers were treated to tweets claiming to have "punk'd" Kutcher. The hackers cheekily wrote to the actor, "Dude, where's my SSL?"

Check out the hackers' tweets inside.