Some time ago I was asked to analyze a very simple dialog box - "Do you trust this application?" I realized that I had no clear concept of what trust was, and I wasn't alone in my ignorance. This talk aims to discuss what trust is and then explore trust relationships that are often times undisclosed, implicate, and codified. I will discuss trust and PKI, online banking and social networking. While I may help the audience understand the impact of the implicate trust relationships, I don't intend on putting you at ease or giving you the tools to feel comfortable about the risks you take online.