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	<title>sholsinger.com &#187; cryptography</title>
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	<link>http://sholsinger.com</link>
	<description>Stephen Holsinger&#039;s blog about the web, OS X, Linux, CSS, PHP, and more</description>
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		<title>Basic Cryptography With PHP &#8211; shift and unshift</title>
		<link>http://sholsinger.com/archive/2009/04/basic-cryptography-with-php-shift-and-unshift/</link>
		<comments>http://sholsinger.com/archive/2009/04/basic-cryptography-with-php-shift-and-unshift/#comments</comments>
		<pubDate>Fri, 10 Apr 2009 06:47:34 +0000</pubDate>
		<dc:creator>Stephen</dc:creator>
				<category><![CDATA[code]]></category>
		<category><![CDATA[Play]]></category>
		<category><![CDATA[cryptography]]></category>
		<category><![CDATA[PHP]]></category>

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		<description><![CDATA[I just started reading Dan Brown&#8217;s, &#8220;Digital Fortress&#8221; which is an excellent read so far. Early on in the novel, we are introduced to some very basic cryptography. Nothing like the FBI Cryptography Challenge, mind you. This is much simpler. So, what is the cypher? It&#8217;s simple. Just shift each letter of the &#8220;clear text&#8221;Read the whole post.]]></description>
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		<title>FBI Cryptography Challenge 2008</title>
		<link>http://sholsinger.com/archive/2008/12/fbi-cryptography-challenge-2008/</link>
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		<pubDate>Tue, 30 Dec 2008 04:40:23 +0000</pubDate>
		<dc:creator>Stephen</dc:creator>
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		<category><![CDATA[cryptography]]></category>
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		<category><![CDATA[security]]></category>

		<guid isPermaLink="false">http://www.sholsinger.com/?p=107</guid>
		<description><![CDATA[What does the following text mean to you? VFWTDLCSWV. YD NSLMIJFWEJFD GSW SL NIJNQBLM FOBV EJFDVF DLNIGTFBSL. KBVBF YYY.AHB.MSK/NSCDC.OFZ FS EDF WV QLSY SA GSWI VWNNDVV. Probably nothing. The FBI has issued a challenge for &#8211; from what I can tell &#8211; the second year running.  This year was supposedly harder than last year. AlthoughRead the whole post.]]></description>
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