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 TwoStepsAuthenticator
 =====================
 
-.net implementation of the TOTP: Time-Based One-Time Password Algorithm - RFC 6238 http://tools.ietf.org/html/rfc6238
+.net implementation of the TOTP: Time-Based One-Time Password Algorithm<br/>
+RFC 6238 http://tools.ietf.org/html/rfc6238
 
 compatible with Microsoft Authenticator for Windows Phone, and Google Authenticator for Android and iPhone.
+
+You can use this library as well for a client application (if you want to create your own authenticator) or for a server application (add two-step authentication on your asp.net website)
+
+For a client application, you need to save the secret key for your user. <br/>
+Then, you only have to call the method GetCode(string) :
+
+<pre><code>var secret = user.secretAuthToken;
+var authenticator = new TwoStepsAuthenticator.Authenticator();
+var code = authenticator.GetCode(secret);</code></pre>
+
+On a server application, you will have to generate a secret key, and share it with the user, who will have to enter it in his own authenticator app.
+
+<pre><code>var authenticator = new TwoStepsAuthenticator.Authenticator();
+var key = authenticator.GenerateKey();</code></pre>
+
+When the user will login, he will have to give you the code generated by his authenticator.<br/>
+You can check if the code is correct with the method CheckCode(string secret, string code).<br/>
+If the code is incorrect, don't log him.
+
+<pre><code>var secret = user.secretAuthToken;
+var code = Request.Form["code"];
+var authenticator = new TwoStepsAuthenticator.Authenticator();
+var isok = authenticator.CheckCode(secret, code);</code></pre>