1	Copyright and P2P Edward W. Felten Dept. of Computer Science Princeton University
2	Copyright Covers original works of authorship, fixed in a tangible medium of expression Literary works (including computer programs) Music works, including lyrics Dramatic works, including musical accompaniment Pantomimes and choreographic works Pictorial, graphic, and sculptural works Motion pictures and other audiovisual works Sound recordings Architectural works
3	Copyright Does not cover Titles, names, short phrases, slogans Ideas, procedures, methods, systems, processes Concepts, principles, discoveries, or devices Lasts a very long time Life of author, plus 70 years
4	Exclusive Rights of © Owner Without permission of © owner, illegal to: Reproduce the work in copies or phonorecords Prepare derivative works Distribute copies or phonorecords to the public Perform the work publicly For audio recordings, to perform publicly by digital audio transmission Public is free to make other uses
5	Fair Use Exception for socially beneficial uses, which would otherwise infringe Four-factor test to determine whether a use is fair: Nature of the work Nature of the use (commercial, educational, commentary, parody, etc.) Amount of work used, in relation to whole Effect of use on market for original work Two categories of fair uses recognized: Transformative use: parody, commentary, education, … Home use: time-shifting, space-shifting, …
6	Theory Beyond (U.S.) Copyright Utilitarian theory – incentive to create Author controls some uses Can charge others for use Incentive to create Balance Creator revenue vs. public access Previous creators vs. new creators
7	Peer-to-Peer Technology Ordinary users share files Search facility Widely used to distribute copyrighted files Illegal to use this way (unauthorized copying)
8	Lifecycle of a Work on P2P
9	Copyright Owner Responses Anti-ripping technology Topic of next mini-lecture Technological disruption of P2P networks Sue direct infringers (end users) Sue P2P vendors
10	Technological Disruption of P2P Distribute spoofed files Easy, but users/designers have countermeasures Targeted denial-of-service attacks Might work, but legally iffy Disrupt self-organization algorithms Legally iffy Infiltrate with misbehaving nodes Legally iffy
11	Sue Direct Infringers Thousands of suits filed by RIAA MPAA has started too Possible damages $30k - $150k per infringing work But settle for $3k or so Has it worked? Succeed in educating users Not much deterrent effect seen; too many people to sue Users move to new P2P networks
12	Sue P2P Vendors More viable target than end users. But: not direct infringers Vendors don’t copy files – their users do. Sue vendors for secondary infringement “aiding and abetting”
13	Secondary Infringement Contributory infringement Infringement by another Knowledge of specific acts of infringement Material contribution to infringement Vicarious infringement Infringement by another Right and ability to control infringing behavior Financial benefit from infringement
14	Secondary Infringement: History 1984: Sony v. Universal (“Betamax”) (Sup. Ct.) VCR legal; has “substantial noninfringing use” 1999: Napster (9^th Circuit) Illegal; central match-making server too involved 2003: Aimster (7^th Circuit) Illegal: design to avoid knowledge of infringement; no legitimate justification offered for design; balancing test 2004: Grokster (9^th Circuit) Legal: no specific, actionable knowledge; no control over use of system May go to Supreme Court
15	Is Current Use of P2P Harmful? Argument for harm: ~25% drop in music sales lots of P2P infringement surveys show downloads substitute for sales Argument against harm: some users sample works on P2P, buy later people mostly download things they wouldn’t buy, so no harm done other explanations for drop in music sales (some support from econometric studies) harm to © owners, but bigger benefit to others
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