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What is DRM?

DRM is an acronym for Digital Rights Management, a broad term used to describe a number of techniques for restricting the free use and transfer of digital content. DRM is used in a number of media, but is most commonly found in video and music files. There are many who argue that DRM is a misnomer, since it deals with use issues rather than the rights of the consumer. They therefore reinterpret DRM to stand for Digital Restrictions Management.

While DRM is most frequently used for movies, it is gaining more widespread use in other media as well. Audio files purchased through many online stores, such as Apple's iTunes Store, have various DRM schemes built in to limit the number of devices they may be played on. Many producers of eBooks are using a similar implementation of DRM to limit how many computers a book may be viewed on, and even how many times it may be viewed. In mid-2005, a number of content producers for television began requesting DRM of their shows via the popular TiVo system.

what is css?

ontent Scramble System (CSS) is a Digital Rights Management (DRM) scheme used on almost all commercially produced DVD-Video discs. It utilizes a relatively weak, proprietary 40-bit stream cipher algorithm. The system was introduced around 1996 and has subsequently been compromised.

The CSS key sets are licensed to manufacturers who incorporate them into products such as DVD drives, DVD players and DVD movie releases. Most DVD players are equipped with a CSS Decryption module. CSS key is a collective term for authentication key, disc key, player key, title key, second disk key set, and/or encrypted key.

Some of the keys are stored on the lead-in area of the disk, which is generally only read by compliant drives. Keys can be passed from a DVD drive to a descrambler over a PC bus using a secure handshake protocol.

more informations,pls refers to:http://en.wikipedia.org/wiki/Content_Scramble_System

if you don'n want view as like bellowings messages,you can refers to:

http://www.metacafe.com/watch/334445/dvd_backup_guide/

Take this tools for example:

Guide for DVD to DVD copy

Only one burner (DVD±RW drive) needed on your PC:

Note: Be sure that the size of the blank disc is the same with or larger than the original disc.

Download this tools from at:http://www.pavtube.com/dvd_copy/

step1. Run the software, insert original DVD disc into the burner and you can learn about the information on the main interface.

Step2. Set the DVD burner as both source and destination.

Step3. Select the copy mode: Full Disc or Main Movie. Full Disc mode for copying the entire original disc with 1:1 ratio. Main Movie mode for creating customized DVD.

Step4. Clickto start the copy process. There are two steps during the copy process: first copy the DVD movie to a temporary folder on your computer, then copy the files in this temporary to anther balck DVD disc.

Step5. When the first copying process is done, eject the original DVD disc and insert a blank DVD disc, click "ok" on the pop up diallog box. Then it will start to burn the DVD movie to the blank DVD disc. Now you can enjoy your copied disc!

More free or shree tools:

cladDVD.NET 3.5.6: http://www.softpedia.com/get/CD-DVD-...dDVD-NET.shtml

Free DVD Ripper:http://www.freewarezoom.com/archives/free-dvd-ripper

Hanbrake: http://handbrake.fr/?article=download it is easy to convert to ipod

dvdshrink http://www.dvdshrink.org/

DVDFab HD Decrypter http://www.dvdfab.com/free.htm