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Re: Clipper and Traffic Analysis
>Does anyone here have any thoughts as to whether Clipper enables traf
fic
>analysis or tracing more easy than it normally is under Switching Sys
tem
>7?
SS7 uses out-of-band signalling. The clipper LEAF is an in-band
signal. Therefore a tap for clipper yields two kinds of information,
content and identities.
Tapping an SS7 signalling network is more expensive and more difficult
to justify. More expensive because it runs packet-switched, more
difficult because it's not the conversation of any particular party
except the phone company.
Also, it probably goes via a different physical path. And at least some
SS7 trunks are encrypted with DES.