This talk follows the spirit of Elena Cross's blog titled "The "S" in MCP Stands for Security". The challenges we face in AI agent deployment in the real world exceed what current security solutions can address. That is true even if you incorporate "best practice" security solutions by design and implement them competently. It's time that we move beyond security to think about trust instead. In this talk, we will examine what are still missing even if we implement common security in MCP and A2A, discuss what these new trust primitives are, and show how developers can adopt strong trust primitives integrated with MCP and A2A in agent based applications.