1. P2P Technologies in the Social Web CS315 – Web Search and Data Mining

2. 2 Well, maybe you can…

3. P2P: peer-to-peer protocol Compare http’s client-server model …

4. P2P: peer-to-peer protocol 1999: Napster created by NEU student Sean Fanning: Every client becomes a server – no central server Compare http’s client-server model vs p2p…

5. Napster vs http Technically – Far more efficient: no server overload – Far more reliable: many machines could crash and still the system would operate fine – Only maintains a directory of files, stores no files at all! Culturally 26 million users in 2 years Napster parties “The universal juke box” 80% of campus traffic from sharing music 26 million copyright violators!? Judge finds Napster guilty of contributory and vicarious copyright infringement: enabling others to infringe and not preventing them

6. Types of infringement Direct infringement Contributory infringement – There has been a direct infringement by someone – The accused contributory infringer knew or should have known about the underlying direct infringement – The accused contributory infringer induced, caused, or materially contributed to the underlying direct infringement Vicarious infringement – There has been a direct infringement by someone – The accused vicarious infringer had the right or ability to control or supervise the underlying direct infringement – The accused vicarious infringer derived a direct financial benefit from the underlying direct infringement 6

7. Napster is dead; Long live Napster 2000: Grokster, Morpheus, Kazaa get rid of central directory

8. RIAA vs Grockster Previous case: The 1984 VCR lawsuit aka “Sony-Betamax” – Supreme Court: Even though people using VCRs may infringe, “ the sale of copying equipment, like the sale of other articles of commerce, does not constitute contributory infringement if the product is widely used for legitimate unobjectionable purposes” 2003: The Court that ruled against Napster, dismisses suit, providing a “safe harbor” against allegations of secondary infringement. RIAA appeals 2005: RIAA wins at the Supreme Court: – Supreme Court: “We hold that one who distributes a device with the object of promoting its use to infringe copyright, as shown by clear expression or other affirmative steps taken to foster infringement, is liable for the resulting acts of infringement by third parties”

10. Legal differences of Atoms vs Bits When you buy a book you can Read it Lend it out Resell it Copy a portion and quote it in a paper Donate it Open it without permission How about a DVD? an audio CD? Mac OS?

11. You can’t copy a DVD You can’t even play it outside your “region”

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14. 14 So, can you even rip a song from a CD you bought?

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16. So, What is Copyright?

17. “If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one, and the receiver cannot dispossess himself of it. Its peculiar character, too, is that no one possesses the less, because every other possesses the whole of it. He who receives an idea from me, receives instructions himself without lessening mine; as he who lights his taper at mine, receives light without darkening me. That ideas should be freely spread from one to another over the globe, for the moral and mutual instruction of man, and improvement of his condition, seems to have been peculiarly and benevolently designed by nature...”Thomas Jefferson 17

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19. The Fundamental Mechanism: A Time- limited Monopoly US Constitution, Article 1, §8: “The Congress shall have the power … To promote the Progress of Science and the Useful Arts, by securing for limited Times to authors and inventors the exclusive Right to their respective Writings and Discoveries.” 19

20. The 5 Rights of Copyright Holder To reproduce – Exemption for Libraries, archives, home recordings, temp copy from the web To prepare derivative works – Including abstracts, enhancements, translations, digitizing text To distribute – Exemptions for “face-to-face” instruction but not distance learning To display publicly – Exemption for instructional broadcasting To perform publicly

21. Fair Use Exemption to Copyright Monopoly The Right of the Public to reproduce and distribute without permission for: – Criticism and Parody – Commentary – News Reporting – Teaching, scholarship, Research – Home Use (off air video and audio) But claiming “fair use” is not granted automatically! Determining “Fair Use” is Subject to a 4-Factor Test – Non-profit vs Commercial Use – (Small) number of copies made – Amount of text copied – Effect of Market potential (dilution of value)

22. Insufficient originality 22

23. Sufficient originality 23

24. Derivative work 24

25. Intellectual Property Issues Copyright – Assume everything on the web is copyrighted including text, images, sound, video. Requires permission from the copyright holder to download, copy, distribute. Trademarks – All famous marks are registered and watched by web crawlers, including logos and design Domain names that confuse origin or dilute the value of the mark will be challenged by owners. Patents – Obviously. But for the web might be confusing Compton’s patent on a search method failed but many e-commerce patents are issued. Trade Secrets

26. Copyright Basics What is Copyrightable – An original work of authorship [low threshold] that is fixed in a tangible form of medium [more than ephemeral]. – Copyright is automatic (since 1974): No special filing is required – © symbol is advised but not required – Ignorance is no defense against copyright infringement. – Not Copyrightable: Facts, ideas, titles, short phrases, public domain information Who owns the Copyright – The Author unless “work for hire” or assigned to publisher How long does the Copyright lasts – By Author: Life plus 70 years – By Employer: 95 years from publication or 120 from creation

27. Increasing duration of copyright 27

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29. Copyrighted on the Web MediumExampleHolder Modern TextScreenplays, books, poetry, quotes, journals, newspaper articles Author or publisher ImagesStills, video, artwork, logosPhotographer, object owner, artist, architect, trademark company SoundPerformance rights, mechanical rights, synchronization rights Lyricist, Performer, Studio, Composer SoftwarePatents, university employees, trade secrets to 3rd party Programmer, university, faculty, students, 3rd party People (pictured or described) Actors, Recognizable People, have rights of Publicity, of Privacy, against defamation Individuals, agents, parents