Electronic hardware trust is an emerging concern for all stake-holders in the semiconductor industry. Trust issues in electronic hardware span all stages of its life cycle – from creation of intellectual property (IP) blocks to manufacturing, test and deployment of hardware components and all abstraction levels – from chips to printed circuit boards (PCBs) to systems. The trust issues originate from a horizontal business model that promotes reliance of third-party untrusted facilities, tools, and IPs in the hardware life cycle. Today, designers are tasked with verifying the integrity of third-party IPs before incorporating them into system-on-chip (SoC) designs. We present three different metrics that could be used for Trust assurance in various stages of the design Flow.