Time sensitive webpage access
<p>Is it possible to create a page that redirects to a private page if a correct time sensitive variable is passed?</p>

<p>Ex:
<a href="http://www.mysite.com/redirectpage.aspx?code=0912042400" rel="nofollow">http://www.mysite.com/redirectpage.aspx?code=0912042400</a></p>

<p>The code value is a year-month-day-time combination that must fall withing some time window (15 min, 30 min etc) based on the server's time.</p>

<p>The redirectpage would parse the code and would redirect to a private page (using an obfuscated url with the code variable) if the code is valid or show a 404.</p>

<p>Usage scenario:</p>

<ul>
<li>Party A wishes to show party B a private page.</li>
<li>A sends a link to B with a code that is valid for the next 30 minutes.</li>
<li>B clicks the link and is redirected to a private page.</li>
<li>After 31 minutes clicking the link produces a 404 and a refresh/postback of the private page also produces a 404.</li>
</ul>

<p>Thanks</p>
