Archive:Skype protocol: Difference between revisions

Many networking and security companies claim to detect and control Skype's protocol for enterprise and carrier applications. While the specific detection methods used by these companies are often proprietary, [[Pearson's chi-squared test]] and stochastic characterization with [[Naive Bayes classifier]]s are two approaches that were published in 2007.<ref>[https://www.dpacket.org/articles/revealing-skype-traffic-when-randomness-plays-you Dario Bonfiglio et al. “Revealing Skype Traffic: When Randomness Plays with You,” ACM SIGCOMM Computer Communication Review, Volume 37:4 (SIGCOMM 2007), p. 37–48] {{webarchive|url=https://web.archive.org/web/20110430074127/https://www.dpacket.org/articles/revealing-skype-traffic-when-randomness-plays-you |date=2011-04-30 }}</ref>

[[Reverse engineering#Legality|Reverse engineering]] of the Skype protocol by inspecting/disassembling binaries is prohibited by the terms and conditions of Skype's license agreement. However European Union law allows reverse-engineering a computer program without getting a permission from an author for inter-operability purposes.<ref>[http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2009:111:0016:01:EN:HTML Directive 2009/24/EC of the European Parliament and of the Council of 23 April 2009 on the legal protection of computer programs]</ref> In the United States, the [[Digital Millennium Copyright Act]] provides protections for reverse engineering software for the purposes of interoperability with other software.<ref>17 U.S.C. Sec. 1201(f).</ref><ref>[[WIPO Copyright and Performances and Phonograms Treaties Implementation Act]]</ref> There are also legal precedents in the United States when the reverse-engineering is aimed at interoperability of file formats and protocols.<ref>Sega vs Accolade, 1992</ref><ref>Sony vs Connectix, 2000</ref><ref>[[Pamela Samuelson]] and Suzanne Scotchmer, "The Law and Economics of Reverse Engineering", 111 ''Yale Law Journal'' 1575-1663 (May 2002) {{cite web |url=http://www.yalelawjournal.org/pdf/111-7/SamuelsonFINAL.pdf |title=Archived copy |accessdate=2015-03-17 |deadurl=yes |archiveurl=https://web.archive.org/web/20110716095222/http://www.yalelawjournal.org/pdf/111-7/SamuelsonFINAL.pdf |archivedate=2011-07-16 |df= }}</ref>