Regulating Online Speech Week 3 - January 29, 31 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 1 Administrivia Questions about the quiz (plagiarism)? • Questions about proper citations and avoiding plagiarism? Homework #2 now posted http://cups.cs.cmu.edu/courses/compsocsp07/homework/hw2.html Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 2 Homework 1 discussion How would your life be different without computers? Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 3 Research and Communication Skills CMU Libraries (http://www.library.cmu.edu) Engineering and Science (a.k.a. E&S) • Location: 4th floor, Wean Hall • Subjects: Computer Science, Engineering, Mathematics, Physics, Science, Technology Hunt (CMU’s main library) • Location: its own building (possibly 2nd ugliest on campus behind Wean), between Tepper and Baker • Subjects: Arts, Business, Humanities, Social Sciences Software Engineering Institute (a.k.a. SEI) • Location: 4500 5th Avenue • Subjects: “Security, Software, Technology” Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 4 Research and Communication Skills Coolest Thing in CMU Libraries Posner Memorial Collection at Posner Center • Rare books • Early prints of famous works • Original copy of the Bill of Rights Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 5 Research and Communication Skills START HERE: Cameo Cameo is CMU’s online library catalog Catalogs everything CMU has – books, journals, periodicals, multimedia, etc. Search Cameo online at http://cameo.library.cmu.edu Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 6 Research and Communication Skills If it’s not in Cameo, but you need it today: Local Libraries Carnegie Library of Pittsburgh http://www.carnegielibrary.org/index.html University of Pittsburgh Libraries http://pittcat.pitt.edu/ Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 7 Research and Communication Skills If it’s not in Cameo, and you can wait: ILLiad and E-ZBorrow ILLiad and E-ZBorrow are catalogs of resources available for Interlibrary Loan from other libraries nationwide (ILLiad) and in Pennsylvania (E-ZBorrow) Order items online (almost always free) Wait for delivery – average 10 business days Find links to ILLiad and E-ZBorrow online catalogs at http://www.library.cmu.edu/Services/ILL/ Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 8 Research and Communication Skills Special needs: Other Useful Databases Links to these and many more databases available at http://www.library.cmu.edu/Search/AZ.html Lexis-Nexis • Massive catalog of legal sources – law journals, case law, news stories, etc. IEEE and ACM journal databases • IEEE Xplore and ACM Digital Library INSPEC database • Huge database of scientific and technical papers Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 9 Research and Communication Skills And of course… Reference librarians are available at all CMU libraries, and love to help people find what they need – just ask! Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 10 Bill of Rights First Amendment • Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances. Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 11 The Internet can’t be censored “The Net treats censorship as damage and routes around it.” - John Gillmore Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 12 Cartoon dogs are anonymous on the Internet Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 13 Real dogs are anonymous on the Internet too! Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 14 Actually, none of this is true It is easy to adopt a pseudonym or a persona on the Internet, but it is difficult to be truly anonymous • Identities can usually be revealed with cooperation of ISP, local sys-admins, web logs, phone records, etc. The Internet can put up a good fight against censorship, but in the end there is still a lot of Internet censorship • Repressive governments and intellectual property lawyers have been pretty successful at getting Internet content removed Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 15 Communications Decency Act Title V of the Telecommunications Act of 1996 Prohibited Internet distribution of indecent or patently offensive material to minors Created restrictions for the Internet similar to broadcast media Introduced by Sen. James Exon (D-Nebraska) • Cited Marty Rimm study • http://www.swiss.ai.mit.edu/6095/articles/cda/saga.html Immediately challenged in court Supreme Court struck down CDA in 1997 (Reno v. American Civil Liberties Union) Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 16 Opposition to the CDA Over-broad, vague, unenforceable CDA includes “indecency standard” • • Obscenity and child pornography are already illegal to distribute (child pornography is also illegal to possess) Obscenity - Miller test: Whether the average person, applying contemporary community standards, would find that the work, taken as a whole, appeals to the prurient interest, Whether the work depicts/describes, in a patently offensive way, sexual conduct specifically defined by applicable state law, Whether the work, taken as a whole, lacks serious literary, artistic, political, or scientific value. • But indecency is defined in CDA as “any comment, request, suggestion, proposal, image, or other communications, that, in context, depicts or describes, in terms patently offensive as measured by contemporary community standards, sexual or excretory activities or organs.” What community do we look at when regulating the Internet? Internet should not be regulated like broadcast Law would chill free speech Internet filters are a better solution Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 17 Support for the CDA Senator James Exon (D-Nebraska), sponsor of Bill: Need to protect children from online pornography Laws that restrict selling porn to children in other media should apply to the Internet Filters are not sufficient • Parents may not be able to figure out how to use them • Children may access computers away from home Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 18 Platform for Internet Content Selection (PICS) Developed by the World Wide Web Consortium Specification for associating metadata with Internet content • Supports self-labels and third-party labels • Supports the development of many rating systems Implemented in MS Internet Explorer and other products Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 19 How technology tools work Internet content Web Usenet Email Chat Gopher FTP Person or tool classifies content For what age group is it appropriate? Is it educational? Tool takes an action Suggest Search Inform Monitor Warn Block Is it fun? Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 20 Who does the classification? Third-party experts Automated tools Local administrators Content providers Survey or vote Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 21 Classification scheme Good for kids Characteristics of content Bad for kids Age suitability Who created content Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 22 Rating systems and vocabularies Math Science English Spelling History French Spanish Gym Art Music Drama A B B+ DC AF A+ BC B Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 23 Descriptive versus subjective Many variables Few variables complex simple Subjective Descriptive Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 24 Can’t derive descriptive from subjective Characters not well developed Gratuitous sex and violence ? Bad acting? Boring plot? Bad script? Dull characters? Unbelievable premise? Unoriginal? Too much violence? Not enough violence? Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 25 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 26 Scope Web sites FTP, gopher, etc. Chat Instant messaging Newsgroups Email Telnet Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 27 Actions Suggest Search Inform Monitor Warn Block Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 28 Mechanisms and interface Location Updates Customizability Other features Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 29 Where are the tools located? Personal computer Server • LAN or local proxy • Remote proxy Internet service provider Search engine Web site Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 30 Updates How are tools updated? • Manual updates required • Automatic updates • No updates required Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 31 Customizability Action Words and phrases Allow and block list elements Time of day Policies for each user Categories of content Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 32 Other features Time limits Separate settings for each child Protect parents’ files Block individual words and pictures vs. full page or whole site Explanation of why blocked vs. silent blocking Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 33 Discussion Diversity of tools in the marketplace is important Need for increased transparency from vendors about the criteria used to classify content Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 34 CDA Sequels Child Online Protection Act (COPA) - passed in 1998 • Banned commercial distribution of material harmful to minors • ACLU challenged this law - Supreme Court has twice upheld lower court injunctions against enforcement, back to lower court in October 2006 • http://www.aclu.org/freespeech/internet/onlinefreespeech.html Children’s Internet Protection Act (CIPA) passed in 1999 • Requires schools and libraries that receive federal funds for Internet access to filter out child pornography, obscene materials, and materials harmful to minors • Upheld by Supreme Court in 2003 Many state laws • Most have been declared unconstitutional Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 35 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 36 Anonymous censorship-resistant publishing The printing press and the WWW can be powerful revolutionary tools • Political dissent • Whistle blowing • Radical ideas but those who seek to suppress revolutions have powerful tools of their own • • • • Stop publication Destroy published materials Prevent distribution Intimidate or physically or financially harm author or publisher Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 37 Anonymity increases censorship-resistance Reduces ability to force “voluntary” selfcensorship Allows some authors to have their work taken more seriously • Reduces bias due to gender, race, ethnic background, social position, etc. Many historical examples of important anonymous publications • In the Colonies during Revolutionary War when British law prohibited writings suggesting overthrow of the government • Federalist papers Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 38 Publius design goals Censorship resistant Tamper evident Source anonymous Updateable Deniable Fault tolerant Persistent Extensible Freely Available Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 39 Publius Overview Publishers Servers Retrievers Publius Content – Static content (HTML, images, PDF, etc) Publishers – Post Publius content Servers – Host Publius content Retrievers – Browse Publius content Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 40 Publishing a Publius document Publishers Servers Generate secret key and use it to encrypt document Use “secret splitting” to split key into n shares • This technique has special property that only k out of n shares are needed to put the key back together Publish encrypted document and 1 share on each of n servers Generate special Publius URL that encodes the location of each share and encrypted document – example: http://!publius!/1e6adsg673h0==hgj7889340==345lsafdfg Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 41 Retrieving a Publius document Publishers Servers Retrievers Break apart URL to discover document locations Retrieve encrypted document and share from k locations Reassemble key from shares Decrypt retrieved document Check for tampering View in web browser Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 42 Publius proxies Publishers Servers P R O X Y Retrievers P R O X Y Publius proxies running on a user’s local machine or on the network handle all the publish and retrieve operations Proxies also allow publishers to delete and update content Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 43 Threats and limitations Attacks on server resources • 100K Content Limit (easy to subvert) • Server limits # of files it will store • Possibility: use a payment scheme Threats to publisher anonymity “Rubber-Hose Cryptanalysis” • Added “don’t update” and don’t delete bit Logging, network segment eavesdropping Collaboration of servers to censor content • A feature? Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 44 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 45 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 46 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 47 Discussion Technology that can protect “good” speech also protects “bad” speech What if your dog does publish your secrets to the Internet and you can't do anything about it? Is building a censorship-resistant publishing system irresponsible? If a tree falls in a forest and nobody hears it…. Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 48 For further reading Publius web site http://cs.nyu.edu/waldman/publius.html Publius chapter in Peer-to-Peer: Harnessing the Power of Disruptive Technologies edited by Andy Oram The Architecture of Robust Publishing Systems. ACM Transactions on Internet Technology 1(2):199-230 http://doi.acm.org/10.1145/502152.502154 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 49 Ethics and Policy issues in Computing • Carnegie Mellon University • Spring 2008 • Tongia • http://www.contrib.andrew.cmu.edu/~tongia/sp08/08-200/ 50