Mechanisms are provided for optimizing an integrated circuit device design to obfuscate emissions corresponding to internal logic states of the integrated circuit device design. A first integrated circuit (IC) device design data structure is received and parsed to identify at least one instance of an obfuscation indicator in the data of the IC device design data structure. At least one IC logic element is marked, in the IC device design, which is associated with the at least one instance of the obfuscation indicator. At least one emission obfuscation optimization is applied to the marked at least one IC logic element to obfuscate emissions from the marked at least one IC logic element and generate an emissions obfuscated IC device design data structure. The emissions obfuscated IC device design data structure is output for fabrication of an IC device in accordance with the emissions obfuscated IC device design data structure.