Counterfeit prevention for optical media
US8893308B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jan 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/0092
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system are provided for counterfeit prevention for optical media. In one example, a system is provided for verifying authenticity information on an optical medium. The system receives the optical medium including a fingerprint having at least one probabilistic feature. A probabilistic feature is a physical feature having both a substantial chance to be read as a first value and a substantial chance to be read as a second value. The system receives an o-DNA signature-at-issuance. The system calculates an o-DNA signature-at-verification by reading each probabilistic feature plural times. The system calculates a vector-of-differences between the o-DNA signature-at-issuance and the o-DNA signature-at-verification. The vector-of-differences includes a maximum distance metric between the o-DNA signature-at-issuance and the o-DNA signature-at-verification. The vector-of-differences indicates the optical medium is authentic if the maximum distance metric is less than a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.