notices to Web site owners distributing FairUse4WM. Finally, on September 22, 2006, Microsoft filed a federal lawsuit against John Does 1–10 a/k/a "viodentia", hoping to identify the person or persons responsible. However, the operator of the highest-ranked mirror of the utility, James Holden, denies having received any such notices or threats. Unable to find the identity of Viodentia, in April 2007 Microsoft dropped the civil suits they had filed. By October 16, 2006, distributors using the Windows Media DRM protection, such as Sky Anytime, were using a patched codec. On September 6, 2007, Microsoft updated IBX to version 11.0.6000.7000, in an attempt to thwart circumvention efforts by variants of the original program. And, as of November 28, 2007, DRM Removal under Windows XP on new installs or updated computers (i.e. those that already contain IBX version 11.0.6000.7000), is not possible without rolling back to Windows Media Player 10. In 2008 another patched version of FairUse4WM was released, allowing it to work with Windows Vista, and IBX versions lower than 11.0.6000.6324. In a ploy to confuse the abusers or software tools, Microsoft revisited the controversial 11.0.6000.6324 version number, releasing a new IBX version, but giving the file a deceptive older version number. DRMDBG DRMDBG is a key-finder, it extracts the keys by hooking an instance of Windows Media Player that it launches. There are several version available each targeting a specific version. The version released on March 3, 2009 supports IBX versions 11.0.6000.6324 and 11.0.6001.8000. Mirakagi Mirakagi was one of the first key-finders; it is no longer in development. See also Janus (DRM) Cardea (DRM) Windows Media PlayReady References External links ,Google Patent FairUse4WM topic-thread on doom9-net forums Microsoft Windows multimedia technology Digital rights management systems Digital rights management circumvention software