Lenovo files patent, that could replace physical signatures

Lenovo has filed a patent at the United States Patent and Trademark Office,

the "integrity symbol" will be identified by a processor, that verifies the integrity of physical documents.
The integrity symbol will then be converted into an “integrity map,” and then compared to the map of the physical document to ensure the document’s integrity.

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Here is a link to the filed patent

http://pdfaiw.uspto.gov/.aiw?PageNum=0&docid=20180046889&IDKey=4E2C6B937301&HomeUrl=http%3A%2F%2Fappft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO2%2526Sect2%3DHITOFF%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsearch-adv.html%2526r%3D1%2526p%3D1%2526f%3DG%2526l%3D50%2526d%3DPG01%2526S1%3D20180046889.PGNR.%2526OS%3Ddn%2F20180046889%2526RS%3DDN%2F20180046889