[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: FCC & Internet phones
-----BEGIN PGP SIGNED MESSAGE-----
>From: Adam Shostack <[email protected]>
>Date: Sun, 10 Mar 1996 00:07:20 -0500 (EST)
>Presumably, the signal has a number of charictaristics. Some of them
>have a central switchboard, where preople go to set up calls.
Hum, I would set-up the system to `dial direct'. Maybe I could
give you this one, for systems that allow random-chat modes.
>Most
>presumably use a mix of a UDP data connection and tcp for control
>functions.
OK, everything after the IP header is encrypted. I don't even know
which protocol is in use.
>They all consist of high volume, long duration connections
>(or data flows in the case of UDP.) Many probably use a standardized
>destination port.
OK, everything after the IP header is encrypted. I don't know
which port is in use.
>They might use the urgent pointer to force data up
>the stack quickly.
OK, everything after the IP header is encrypted. I don't know
which protocol options are in use.
> In short, yes the data streams can be easily found, if one can
>tap and grep a T3 in real time.
In short, assuming IPSEC, the data stream cannot be easily found.
Slightly different assumptions led to a radically different outcome.
Regards,
Loren
- --
Loren J. Rittle ([email protected]) PGP KeyIDs: 1024/B98B3249 2048/ADCE34A5
Systems Technology Research (IL02/2240) FP1024:6810D8AB3029874DD7065BC52067EAFD
Motorola, Inc. FP2048:FDC0292446937F2A240BC07D42763672
(708) 576-7794 Call for verification of fingerprints.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.2
iQCVAwUBMUTVK/8de8m5izJJAQGOQQP/R0iXXj4hSytLhifxkxWjkCHItIpQAZvZ
J73NdpVIK3EOO8dEXl4jWimh//mTmW5Zt0kIyZtRW4Sn5UlE6FHkG7fnNfgSZbzR
8fu0XOM3ScRKioNhdp0e5ECnB6WrqaSRgTH0K9e+oheAN2zVob/bTb0Gh+gSe930
Znf9388LkZ4=
=JMrb
-----END PGP SIGNATURE-----