Hi, during a web search for the FBI ECSU-DITU unit - the "switch" between NSA and the cooperating providers, mentioned in the added WaPo slides - i stumbled upon <http://electrospaces.blogspot.ro/2013/07/new-insights-into-prism-program.html>, where the author expresses his summary or interpretation of PRISM. From there i got <http://cryptome.org/2012/08/fbi-spy-letf.pdf>, a summary of a Law Enforcement Technical Forum meeting from 2010 with some indirect informations about DITU.
Btw. regarding Skype: on p. 5, a Mr. Scott Sheets from Verizon Wireless "provided the following detailed information: # SIP Media Gateway (provided by Level 3 (NB: the same as in <http://info.publicintelligence.net/US-NSAs/US-NSAs-Level3.pdf>?), located in Atlanta, is used when Skype related call is dialed. The SIP Media Gatewat converts the skype call to VoIP, # Data Channel - skype encrypts it using a propriatary algorithm. However, at the request of Verizon, decrypting mechanisms were provided," But, has anybody more informations about ECSU-DITU? -- Katana -- Too many emails? Unsubscribe, change to digest, or change password by emailing moderator at compa...@stanford.edu or changing your settings at https://mailman.stanford.edu/mailman/listinfo/liberationtech
