Authentication of physical object using internal structure
US10841098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2020 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Apr 28, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3247
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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 fp is obtained by applying an error-correction encoding scheme, ErrorCC, to the random key according to fp=ErrorCC(k), wherein fp has the same size as the binary code fa. An encrypted binary code, r, is computed according r=fa⊕fp, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.