title: What is the relationship between owin and oAuth2.0?
body: <p>I study external login strategies and the terminology confuses me. What's the relation between the following.</p>
  
  <ul>
  <li>Owin</li>
  <li>OauthWebSecurity</li>
  <li>OAuth 2.0 </li>
  <li>Owin Katana</li>
  <li>ASP.NET Identity</li>
  </ul>