<story><title>A JPEG that becomes a PNG after AES encryption and a PDF after 3DES decryption</title><url>https://code.google.com/p/corkami/source/detail?r=1906</url></story><parent_chain></parent_chain><comment><author>zrm</author><text>See also The International Journal of Proof-of-Concept Or Get The Fuck Out.&lt;p&gt;&lt;a href=&quot;https://archive.org/details/Pocorgtfo00&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;Pocorgtfo00&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https://archive.org/details/Pocorgtfo01&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;Pocorgtfo01&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https://archive.org/details/Pocorgtfo02&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;Pocorgtfo02&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https://archive.org/details/pocorgtfo03&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;pocorgtfo03&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https://archive.org/details/pocorgtfo04&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;pocorgtfo04&lt;/a&gt;&lt;p&gt;&lt;a href=&quot;https://archive.org/details/pocorgtfo05&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;archive.org&amp;#x2F;details&amp;#x2F;pocorgtfo05&lt;/a&gt;</text></comment>
<story><title>A JPEG that becomes a PNG after AES encryption and a PDF after 3DES decryption</title><url>https://code.google.com/p/corkami/source/detail?r=1906</url></story><parent_chain></parent_chain><comment><author>gear54rus</author><text>How in the hell does one discover that kind of thing? :) I don&amp;#x27;t really know much about crypto and symmetric ciphers in general, but aren&amp;#x27;t the odds of discovering something that converts from JPEG to PNG by applying AES extremely small? Let alone something that ALSO goes from JPEG to PDF by applying 3DES.&lt;p&gt;I presume there is some algorithm based on the nature of ciphers themselves?</text></comment>