viodentia [1] (sometimes written with an uppercase v) is a pseudonym used by the creator of FairUse4WM, a program that removes Microsoft's copy protection technology from Windows Media Video (".WMV") files.
[2] A number of prominent websites use DRM to ensure that media and other downloads are unable to be copied for software piracy or other improper purposes.
[citation needed] This copy protection system also has the effect of preventing what would otherwise be claimed as fair use - legitimate owners backing up paid downloads in case of loss or damage to their computer data, or for use in on other devices where legal to do so.
"viodentia" is the pseudonym of one or more individuals who wrote software that would enable users to remove the protection mechanism from their media, thus allowing it to be copied for legal use.
Forum posts under the name "viodentia" stated in 2006 that the program was to enable exercise of fair-use rights only, and excluded import of cryptographic data needed for piracy usage.