For weeks, the blogosphere has been abuzz with tales of intrigue about Sony’s XCP copy protection system. Among the strangest revelations was that XCP itself infringes on the copyrights to several open source software projects. In one case, Sam Hocevar found conclusive evidence that part of XCP’s code was copied from a program called DRMS, which he co-authored with DVD Jon and released under the terms of the GPL open source license. What made this finding particularly curious is that the purpose of DRMS is to break the copy protection on songs sold in Apple’s iTunes Music Store. Why would XCP rip off code intended to defeat another vendor’s DRM?

Hidden Feature in Sony DRM Uses Open Source Code to Add Apple DRM