The Kaba Saflok InSync cylinder uses a simulated key with RFID to control its mechanism. While this is a very clever and popular lock, it can be opened in seconds with the insertion of a shim wire through its USB data port. This video was produced several years ago, and the manufacturer may have closed the gap that allowed this defeat to occur.

This is an excellent example of insecurity engineering and is discussed in the new book entitled Tobias on Locks and Insecurity Engineering, published by John Wiley.