% DRAFT: User-Agent (UA) Accidents % Michael Stone % July 14, 2013 I rely heavily on a small number of "user agents" -- my web browser, my email client, my IM client, etc. -- to help meet my computer-related security goals but, even when I think hard, I find that I am confused about what *accidents* -- i.e., what unplanned and unacceptable losses -- these programs must help to prevent. Here are the accidents that I have considered so far: * Most of them have corresponding security goals: * control-flow integrity * separation * secrecy * authentication * unlinkability * faithful representation