DVD Decrypter can create backup disc images of the DVD-Video structure of DVDs
DVD Decrypter is a software application that can create backup disc images of the DVD-Video structure of DVDs. It can be used to image any DVD, but controversially it is especially useful for decrypting copy-protected movies. The program can also burn images to disc. CSS decrypting software (such as DVD Decrypter, DVDSmith, AnyDVD, Smartripper, and DVD Shrink) allows a region-specific DVD to be copied as an all-region DVD. It also removes Macrovision, Content Scrambling System (CSS), region codes, and user operation prohibition.
As DVD Decrypter facilitates the removal of copy restrictions, certain uses may be illegal under the United States Digital Millennium Copyright Act. In countries without similar laws there may not be any legal restrictions.
On June 6, 2005, the developer (known as "Lightning UK!") announced via the CD Freaks website that he received a cease and desist letter from Macrovision. He later stated it was within his best interests to comply with the letter, and stopped development of the program. By June 7, 2005 a mirror site was up which allowed people to download the final version (3.5.4.0).
http://www.dvddecrypter.org.uk/