System and method of generating a per sale watermarking on digital files

摘要

A system, method and computer readable media provided for watermarking a digital file. The method comprises altering samples of the digital file available for distribution upon request by adding a number such as + or a−1 to each sample of the digital file according to a probability value and compressing the digital file with the altered samples. Altering the sample of the digital file may be done on a per distribution or per sale basis.