title: WebResource.axd Encryption String?
body: <p>When looking at the source code of a page generated by .ASP (to which I'm a noob,) I sometimes see source referenced through WebResource.axd?d= followed by a really long and unreadable string of letters and numbers. I'll take a guess and say it's a pointer to a script (based on the script tag I see) in a library perhaps?  </p>
  
  <pre><code>&lt;script src="/Portal/WebResource.axd?d=amy4Qb3YKPApQh4cMI21MoSwRmquuliNIlSx7bF7geaDZ56xwuLIPLkQdH_fNIrpB_hHiKLdv041_WJ1yWe27HSI4a5Spexg3Tg9fHZd33Q1&amp;amp;t=634666000000418502" type="text/javascript"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>Am I close? HOW is this string generated? Is it created automatically by the system? For example, as the developer, if I typed <code>&lt;script src="/folder/myscript.js"&gt;</code> does WebResource convert it on the server side into this long string and return it this way, for security maybe?</p>