Re: [Fwd: [IP] Feds: VoIP a potential haven for terrorists]

[David Lesher <wb8foz () nrk com>]

Speaking on Deep Background, the Press Secretary whispered:
> I'm told that most CALEA warrants only authorize a pen register, not an
> actual tap.  Pen registers are trivial to implement, since the provider's
> software undoubtedly has an option to produce CDRs for billing or planning
> purposes.  Unfortunately this doesn't cover the case of purely P2P calls
> which don't have a VoIP provider; if the suspect is using such software, the
> only way to produce a pen register is with a tap.

Note that the requirements for a trap/trace aka pen register are
a fraction of those for a Title III intercept.

See http://www.usenix.org/events/sec01/eckenwiler/index.htm for
at least an introduction..







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