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	<title>Comments on: MD5 Hashes &#8211; Part 2</title>
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	<link>http://www.ipsidixit.net/2006/10/17/md5-hashes-part-2/</link>
	<description>A far off place</description>
	<lastBuildDate>Tue, 17 Aug 2010 23:15:14 +0000</lastBuildDate>
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		<title>By: sgroarke</title>
		<link>http://www.ipsidixit.net/2006/10/17/md5-hashes-part-2/comment-page-1/#comment-3832</link>
		<dc:creator>sgroarke</dc:creator>
		<pubDate>Thu, 17 Jul 2008 08:44:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.ipsidixit.net/2006/10/17/44/#comment-3832</guid>
		<description>I&#039;d love to help, but I&#039;m not even clear what&#039;s been asked! I *think* that I&#039;m asked to &quot;decode&quot; an MD5 hash.

I obviously failed to make one thing clear: hashes, by their very definition, cannot (if well constructed anyway!) be &quot;decoded&quot;. Hashing does not equate to encryption!

If the hash supplied comes, for example, from a system&#039;s password file then one might be able to &quot;crack&quot; it by a combination of brute-forcing and a dictionary attack. This is not just theoretically possible, but, a couple of years ago, I actually did this on a password file, with considerable success.

However for all I know, this MD5 hash comes from hashing a 200MB PDF file. Or whatever.

You cannot decode an MD5 hash. Period. Only if you know that the item that has been hashed is relatively small have you any chance of engineering a reverse.</description>
		<content:encoded><![CDATA[<p>I&#8217;d love to help, but I&#8217;m not even clear what&#8217;s been asked! I *think* that I&#8217;m asked to &#8220;decode&#8221; an MD5 hash.</p>
<p>I obviously failed to make one thing clear: hashes, by their very definition, cannot (if well constructed anyway!) be &#8220;decoded&#8221;. Hashing does not equate to encryption!</p>
<p>If the hash supplied comes, for example, from a system&#8217;s password file then one might be able to &#8220;crack&#8221; it by a combination of brute-forcing and a dictionary attack. This is not just theoretically possible, but, a couple of years ago, I actually did this on a password file, with considerable success.</p>
<p>However for all I know, this MD5 hash comes from hashing a 200MB PDF file. Or whatever.</p>
<p>You cannot decode an MD5 hash. Period. Only if you know that the item that has been hashed is relatively small have you any chance of engineering a reverse.</p>
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		<title>By: Izzy</title>
		<link>http://www.ipsidixit.net/2006/10/17/md5-hashes-part-2/comment-page-1/#comment-3829</link>
		<dc:creator>Izzy</dc:creator>
		<pubDate>Sun, 22 Jun 2008 16:48:20 +0000</pubDate>
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		<description>You said it isnt dycrptable by definition, my friend said  &quot;I WILL OFFICIALLY +REP AND THINK WHOEVER DECODES THIS PWNS!

If you do it, you are pwnage!

085dc5be23fc96443fae66cb4873e7c5

Here&#039;s a hint, it&#039;s an MD5 hash. &quot;
I need the +rep but is there a way to decode it? 
kthanxbai</description>
		<content:encoded><![CDATA[<p>You said it isnt dycrptable by definition, my friend said  &#8220;I WILL OFFICIALLY +REP AND THINK WHOEVER DECODES THIS PWNS!</p>
<p>If you do it, you are pwnage!</p>
<p>085dc5be23fc96443fae66cb4873e7c5</p>
<p>Here&#8217;s a hint, it&#8217;s an MD5 hash. &#8221;<br />
I need the +rep but is there a way to decode it?<br />
kthanxbai</p>
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