07-06-2012 дата публикации
Номер: US20120139693A1
A method and system for fingerprinting a content item is described, the and system method include providing the content item, the content item including a set of content item elements, the set of content item elements denoted E, such that E={E 1 , E 2 , E i , E m }, providing information uniquely associated with a single user, the information including a string of bits, hereinafter denoted S 0 , parsing S 0 into a plurality of subsequences of strings of bits, hereinafter denoted S 1 ,, Sn, the parsing being performed such that S 0 equals a function of S 1 ,, Sn, providing a matrix of content item replacement elements, the matrix denoted R, each row of matrix R including, for at least each one of n members of set E, an array of content item replacement elements for E i denoted R i , such that R i ={R i1 , R ij }, uniquely associating each one of S 1 , Sn with one matrix element of matrix R, so that for every one of S 1 ,, Sn there exists a corresponding element of E, for every one of S 1 ,, Sn replacing at least one instance of the corresponding element E in the content item with the associated one matrix element of matrix R for the corresponding one of S 1 ,, Sn, and outputting a replacement content item including the result of the replacing, wherein the members of R i for each E i are chosen according to at least one similarity criterion. Related hardware, systems and methods are also described.
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