On Sun, May 24, 2009 at 1:22 AM, Eben Moglen <mog...@softwarefreedom.org> wrote: > On Saturday, 23 May 2009, Luke Kenneth Casson Leighton wrote: > > it's the RTMPE encryption that they're after. > > perhaps eben moglen might be able to assist. mog...@softwarefreedom.org > > Thank you for the suggestion, Luke. The Software Freedom Law Center > provides free legal assistance to non-profit makers and distributors > of FOSS. If any current SFLC client, or any individual developer or > non-profit community member receives a DMCA takedown notice or other > legal communication from Adobe or others concerning this matter, we'd > be happy to help. Write h...@softwarefreedom.org and mention this > correspondence, or write me directly if you prefer. In the meantime, > though we should be alert, let's avoid jumping to conclusions. > > -- > Eben Moglen v: 212-461-1901 > Professor of Law, Columbia Law School f: 212-580-0898 moglen@ > Founding Director, Software Freedom Law Center columbia.edu > 1995 Broadway (68th Street), fl #17, NYC 10023 softwarefreedom.org
eben, thank you. i've alerted the author of rtmpdump, as, according to this: http://linuxcentre.net/rtmpdump-can-be-used-to-download-copyrighted-works-like-a-web-browser/ http://www.chillingeffects.org/anticircumvention/notice.cgi?NoticeID=25159 it looks like sourceforge caved in and gave adobe his contact details. a quick analysis of the algorithm show it to be nothing more advanced than what SSL does. there is no input from passwords. the verification process takes the size and a hash of the SWF file (which is being executed in the browser) as inputs, and mashes it with information that is pubicly exchanged. there is no security. there is only end-to-end secrecy (just like SSL). anyone who know the algorithm and can download the swf file can therefore obtain the content. given that swf files are published on web sites this all seems pretty dumb. it's certainly not a "protection" mechanism. it's more of a "verification" procedure. "have you now or at any time downloaded the swf file? was that a mathematically-irrefutable yes? okaay you can have the content then". make of that what you will, but i'd say that it's definitely not a copyright protection mechanism. all the information needed to obtain the content is publicly available. l. _______________________________________________ Gnash-dev mailing list Gnash-dev@gnu.org http://lists.gnu.org/mailman/listinfo/gnash-dev
