<body><pre>
Copyright
Ed Felton  Princeton

Copyright
  applies to creative works, author gets copyright automatically,
  can sell it.
    includes:
      - copy
      - distribute to public
      - perform in public
      - make a derivative work
      - etc
    except:
      - use not granted
      - sell or lend legally acquired
      - fair use
         -- exempts otherwise illegal uses
	 -- based on judgment call

  Indirect liability
    - if they make some material contributions to infringement
    - they have knowledge of a particular act of infringement, at a 
      time when they can prevent it

DRM
  Digital Rights/Restrictions Management
  Technology to control uses of digital information
    - restrictions may or may not correspond to
      copyright law
    - probably impossible to accommodate fair use
  Three types:
    - selective incompatibility
    - containment
    - marking

  DRM: Threat model
    - P2P model
    - Personal copying model
      
  Mechanisms
    - selective incompatibility
      ineffective so far
    - containment
      encrypt content at factory, decrypt in player device
	- attack: get content after it's decrypted
	- attack: reverse engineering
    - marking
      needs to be
	-- imperceptible
	-- indelible
	-- detectable
      e.g.
	SDMI watermark for audio

P2P Countermeasures
  Spoofing
  Download/identify/sue
  Filtering by ISP
  Targeted DoS attacks
  Disruption of P2P tools and protocols

Legal Regulation
  DMCA
  Broadcast flag
  Hollings mandate bill (failed)
  P2P warning bill
  INDUCE Act
</pre></body>
