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Systems and methods for media authentication

  • US 8,095,798 B2
  • Filed: 03/15/2010
  • Issued: 01/10/2012
  • Est. Priority Date: 02/01/2002
  • Status: Expired due to Fees
First Claim
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1. A system for authenticating a digital medium by determining a presence of an anomaly region corresponding to a data segment of the digital medium comprising:

  • a read unit that performs multiple read operations on a data segment of the digital medium to generate multiple corresponding read data results;

    a calculating unit configured to calculate corresponding digital signatures using actual data values of underlying data of the read data segment for each of the multiple read data results;

    a determining unit configured to determine whether an anomaly region is present in the data segment based on a comparison of the digital signatures by determining whether any of the digital signatures are equal in value, and if a predetermined number of the digital signals are not equal in value, determining the anomaly region to be present; and

    an authentication mechanism configured to authenticate the digital medium in response to a determination of a presence of the anomaly region.

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