The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2020
Filed:
Apr. 28, 2020
University of Newcastle Upon Tyne, Tyne and Wear, GB;
Feng Hao, Tyne and Wear, GB;
Ehsan Toreini, Tyne and Wear, GB;
Siamak F. Shahandashti, Tyne and Wear, GB;
University of Newcastle Upon Tyne, Newcastle upon Tyne, GB;
Abstract
A method for preventing counterfeiting of an object includes capturing an image of at least a portion of the object that is at least partially transparent. The captured image includes features of the internal structure of the object. Based on the image, a code is generated that encodes features of the internal structure of the object. The code is recorded. Generating the code includes applying a filter to the image to obtain a filtered image, and processing the filtered image to obtain a binary code. A random key, k, is generated, and a codeword fis obtained by applying an error-correction encoding scheme, ErrorCC, to the random key according to f=ErrorCC(k), wherein fhas the same size as the binary code f. An encrypted binary code, r, is computed according r=f⊕f, where ⊕ denotes modulo-2 addition. A hash value, h, is computed according to h=H(k), where H is a one-way hash function. Recording the code comprises recording the encrypted binary code r and the hash value h. A digital signature, s, is computed based on r and h, wherein recording the code comprises recording the digital signature, s.