DRM

What is DRM

• Digital Rights management

• Used to describe a number of techniques used to restrict the use of digital media

The law

• Digital Millennium Copyright act• To implement the 1996 World

Intellectual Property Organization treaties

• Illegal to– Circumvent anti-piracy measure– Manufacture, sell, or distribute code-

cracking devices

Examples

• Content Scrambling System (CSS)– Used to encrypt DVDs– Jon Lech Johansen cracked it DeCSS– Lets DVDs play correctly on Linux– http://www.tinyted.net/eddie/css.html

Examples cont.

• Sony rootkit of 2005 – Automatically installed– Sent “stuff” back to sony– Easy to get around– Hard to remove– Hacker friendly

More examples

• All the music file format– Windows media format– iTunes – Real player

• Don’t all play all MP3 players

Other names

• The Free Software Foundation– Digital Restrictions Management– Moglen and Free Software Foundation

founder, Richard Stallman, are co-authors of the GPL version 3

• ZDNet Executive Editor David Berlind – Content Restriction, Annulment and

Protection or CRAP