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    <title>topic Re: SIM Relay Response basic API authentication? in Integration and Testing</title>
    <link>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34198#M18682</link>
    <description>&lt;P&gt;Hi RaynorC1emen7.&lt;/P&gt;&lt;P&gt;That's quick :)&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks a lot.&lt;/P&gt;</description>
    <pubDate>Thu, 09 May 2013 20:19:06 GMT</pubDate>
    <dc:creator>hendra</dc:creator>
    <dc:date>2013-05-09T20:19:06Z</dc:date>
    <item>
      <title>SIM Relay Response basic API authentication?</title>
      <link>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34196#M18680</link>
      <description>&lt;P&gt;Hi guys.&lt;/P&gt;&lt;P&gt;Please excuse if I'm posting in the wrong thread, or if this has been asked before. I'm a new here and am having difficulty finding an answer to my situation, as follows:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I'm currently in &lt;STRONG&gt;Test Phase 1&lt;/STRONG&gt;, and am using &lt;STRONG&gt;SIM relay response&lt;/STRONG&gt; to authorize and capture transactions. The name of relay page is &lt;STRONG&gt;receipt.php&lt;/STRONG&gt;, and all seems to work well.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;However, how to make sure that this receipt.php be POST-ed and grabbed &lt;STRONG&gt;ONLY BY&lt;/STRONG&gt; Authorize.net and not someone else? I was thinking to check $_SERVER[] but then surely there is an API to do this? Or... is this what isAuthorizeNet() is for?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks,&lt;/P&gt;&lt;P&gt;Hendra&lt;/P&gt;</description>
      <pubDate>Thu, 09 May 2013 20:02:16 GMT</pubDate>
      <guid>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34196#M18680</guid>
      <dc:creator>hendra</dc:creator>
      <dc:date>2013-05-09T20:02:16Z</dc:date>
    </item>
    <item>
      <title>Re: SIM Relay Response basic API authentication?</title>
      <link>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34197#M18681</link>
      <description>&lt;P&gt;use the isAuthorizeNet() to check the post information is from authorize.net.&lt;/P&gt;</description>
      <pubDate>Thu, 09 May 2013 20:11:23 GMT</pubDate>
      <guid>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34197#M18681</guid>
      <dc:creator>RaynorC1emen7</dc:creator>
      <dc:date>2013-05-09T20:11:23Z</dc:date>
    </item>
    <item>
      <title>Re: SIM Relay Response basic API authentication?</title>
      <link>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34198#M18682</link>
      <description>&lt;P&gt;Hi RaynorC1emen7.&lt;/P&gt;&lt;P&gt;That's quick :)&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks a lot.&lt;/P&gt;</description>
      <pubDate>Thu, 09 May 2013 20:19:06 GMT</pubDate>
      <guid>https://community.developer.cybersource.com/t5/Integration-and-Testing/SIM-Relay-Response-basic-API-authentication/m-p/34198#M18682</guid>
      <dc:creator>hendra</dc:creator>
      <dc:date>2013-05-09T20:19:06Z</dc:date>
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