The design of secure and trusted embedded systems has recently drawn enormous attention from system-design practitioners. A secure system is only as strong as the weakest link. Therefore, any security functions implemented in an embedded system must be considered in both hardware and software, at all design abstraction levels, in communications between components, and in the manufacturing phase. In addition, these implementations are subject to typical power, performance, and cost constraints of consumer embedded systems. This issue of IEEE Design & Test features a special issue on Design and Test of Integrated Circuits for Secure Embedded Computing.