Method and apparatus for authenticating a magnetic fingerprint signal using an adaptive analog to digital converter
US7210627B2 · kind B2 · utility
63Cited by
57References
13Claims
0Family size
Inventors
Key dates
| Filing date | Dec 17, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Jun 1, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for verifying the authenticity of data contained in a magnetic medium using the remanent noise characteristics of the magnetic medium. One embodiment of the invention includes an over-sampled modulator and at least one channel in communication with an output of the over-sampled modulator. The at least one channel is configured to filter the output of the over-sampled modulator and the at least one channel is configured to vary the bandwidth of the filter applied to the output of the over-sampled modulator in response to variations in the bandwidth of the signal generated by the sensing unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.