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LetterScreen+ |
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IPI |
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Digital IPI |
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IDP |
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Invisible Document Protection provides personalized protection for non-photo documents. IDP is a kind of digital watermark to protect security documents against alteration. The concept assumes that preprinted documents are personalized by B&W laser-printers. The invisible information will be verified with a decoder. IDP can protect a great variety of documents, including but not limited to birth, marriage, land and vehicle-ownership certificates, university diplomas, notary documents, government documents with restricted circulation, etc. |
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