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[liberationtech] FBI ECSU-DITU

katana katana at
Wed Jul 10 07:52:29 PDT 2013


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
where the author expresses his summary or interpretation of PRISM. From
there i got <>, 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
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?


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