 After further examination of the procedure, a white paper was drafted in 2005 by Barry Wels & Rop Gonggrijp of The Open Organization Of Lockpickers (TOOOL) detailing the method and its applicability.A patent exists for a lock device following the same principle as the bump key from 1926–1928.Marc Tobias, an American security expert, began to talk publicly in the United States about the technique and its potential security threats.