The Microsoft patent takes concepts from spread-spectrum technology--used by the military for secure radio communications--and adapted them to the task of embedding the content producer's name within MP3 and .WAV files.
Microsoft may have just succeeded in giving the lie to claims by anti-DRM advocates that tech and record companies should forget about digital-rights management because they can never come up with something that's totally immune to cracking.
That's because two inventors working in Redmond, Darko Kirovski and Henrique Malvar, have taken concepts from spread-spectrum technology--used by the military for secure radio communications--and adapted them to the task of permanently inserting the owner's (aka content producer's) name within MP3 and .WAV files.
Microsoft was awarded U.S. Patent 7,266,697, entitled "Stealthy audio watermarking," on Sept. 4, for the duo's work.
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