Patent ID: 7080041
Filing Date: 2006-07-18
Classification: B42D,G06K,G06Q

Abstract:
1. A system for authentication of a counterfeit-resistant document, comprising: (a) means for receiving an apparently non-deterministic characteristic of a recording medium of the document; (b) means for receiving a document content of the document; (c) means for storing the apparently non-deterministic characteristic and document content in association with each other; and (d) means for comparing the stored description of the apparently non-deterministic characteristic and document content with an observed apparently non-deterministic characteristic and document characteristic; wherein said document includes a unique identifier and the apparently non-deterministic characteristic comprises a pseudorandom copy-resistant printed marking, wherein an algorithm defines a mapping between the unique identifier and a pattern of the pseudorandom copy-resistant printed marking; wherein said system further comprises means for executing said algorithm; and wherein said comparing means includes means for comparing an observed characteristic of a document to be authenticated to an output of said executing means.