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	<title>PHP Programming &#187; spam</title>
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	<description>A blog about Linux, Apache, MySQL, PHP and web application security</description>
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		<title>Detecting a fake email address using Markov chains</title>
		<link>http://www.idontplaydarts.com/2009/08/detecting-a-fake-email-address-using-markov-chains/</link>
		<comments>http://www.idontplaydarts.com/2009/08/detecting-a-fake-email-address-using-markov-chains/#comments</comments>
		<pubDate>Sat, 22 Aug 2009 09:29:47 +0000</pubDate>
		<dc:creator>Phil</dc:creator>
				<category><![CDATA[MySQL]]></category>
		<category><![CDATA[PHP]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[Email Addresses]]></category>
		<category><![CDATA[fraud]]></category>
		<category><![CDATA[Markov]]></category>
		<category><![CDATA[spam]]></category>

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		<description><![CDATA[Markov chains are a set of states where any state is only dependant on the previous state. These can be used to generate &#8220;real-looking&#8221; words from a given set of text. By the same methods we can decide if a string is a valid word or a load of garbage by assessing each letter and [...]]]></description>
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		<title>Defeating open proxy servers</title>
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		<pubDate>Thu, 20 Aug 2009 22:25:38 +0000</pubDate>
		<dc:creator>Phil</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[PHP]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[fraud]]></category>
		<category><![CDATA[Proxy]]></category>
		<category><![CDATA[spam]]></category>

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		<description><![CDATA[I&#8217;ve recently been in a situation where lots of users were abusing a website using a series of open proxies. They were using these open proxies to commit large volumes of fraud. A static list of known proxies can help to combat this issue but you end up fighting a loosing battle trying to keep [...]]]></description>
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