Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Copy detection pattern
open-in-new
<p>A copy detection pattern (CDP) or graphical code is a small <a href="/facts/Randomness/QJQBoEX5">random</a> or <a href="/facts/Pseudorandomness/kfs1wfhY">pseudo-random</a> <a href="/facts/Digital_image/3TNT47Mv">digital image</a> which is printed on documents, labels or products for <a href="/facts/Counterfeit/MaYRLckY">counterfeit</a> detection. <a href="/facts/Authentication/64y4S69b">Authentication</a> is made by scanning the printed CDP using an <a href="/facts/Image_scanner/7DEJFTwx">image scanner</a> or <a href="/facts/Mobile_phone_camera/EzCfpkdl">mobile phone camera</a>. It is possible to store additional product-specific data into the CDP that will be decoded during the scanning process. A CDP can also be inserted into a <a href="/facts/2D_barcode/Mkh4cCTp">2D barcode</a> to facilitate smartphone authentication and to connect with traceability data. </p>