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		<updated>2026-05-05T20:02:53Z</updated>
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				<updated>2013-08-12T03:12:18Z</updated>
		
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'''PDMark''' is a scheme for data encoding on paper documents, apparently a 2-D bar code symbology. It was developed by Ardaco, a company based in Slovakia. PDMark supports data compression, encryption, secure signatures, and data redundancy for recovery of damaged documents. It is referred to as &amp;quot;patented&amp;quot;, but no specific patent is cited.&lt;br /&gt;
&lt;br /&gt;
== Links ==&lt;br /&gt;
* [http://rp7.ffg.at/upload/medialibrary/SEC1_profile_ARDACO_SME.pdf Info on Ardaco products including PDMark]&lt;/div&gt;</summary>
		<author><name>Dan Tobias</name></author>	</entry>

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