The bill is designed to be counterfeit-proof, and while nothing can be completely secure, this cash has some pretty tough security features. Those includes a ribbon with 3-D display and disappearing ink. The Associated Press has a video out covering all the new features. If you'd like an in-depth look into the new bill and the process behind it, Esquire has a fantastic long read by Chris Jones.
[H/T Laughing Squid]