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- Newsgroups: alt.security
- Path: sparky!uunet!unislc!erc
- From: erc@unislc.uucp (Ed Carp)
- Subject: Re: Tom Clancy, and whitenoise digital encryption
- X-Newsreader: TIN [version 1.1 PL6]
- References: <4142@bcstec.ca.boeing.com>
- Message-ID: <1992Nov11.171509.14350@unislc.uucp>
- Organization: Unisys Corporation SLC
- Date: Wed, 11 Nov 1992 17:15:09 GMT
- Lines: 43
-
- Jeff Silverman (silverm@bcstec.ca.boeing.com) wrote:
-
- : scs@lokkur.dexter.mi.us (Steve Simmons) writes:
- :
- : >kdm1@Ra.MsState.Edu (Kenneth D. Mitchell) writes:
- :
- : >>In the book _Sum of All Fears_ by Tom Clancy he mentions the CIA
- : >>using a cd containing random noise to encrypt data, I know this
- : >>is a good method to use, and I know Tom Clancy keeps his
- : >>details accurate but I was wondering if the CIA really uses this method.
- :
- : >The series would be broadcast continuously. Whenever a message was to
- : >be sent, the bits of the message would be xored onto the random bits.
- : >Recievers were in sync and generated the same sequence. They xored the
- : >sequence recieved with the generated sequence. The message would
- : >immediately appear.
-
- : This is good cryptographic practice. One way the bad guys (them) know that
- : the good guys (us) are up to something, is that the quantity of traffic changes.
- : Usually upwards, theoretically downwards is possible. This technique is called
- : "Traffic Analysis". If you send random information continuously, then the
- : bad guys can't do it, because the rate of transmission remains constant.
- : The technique will impact your long distance bills and may cause ire
- : of other users on the same Ethernet.
-
- This method was widely used, even back in the 60's, by the military, even over
- lines considered "tamper-proof" (using such methods as pressurizing the comm
- cables with nitrogen, then setting an alarm if the pressure dropped). But how
- would this technique affect your long-distance bills? If the line is connected
- all the time (leased), it doesn't matter if what's going down it is white noise,
- no noise, or data.
- --
- Ed Carp erc@apple.com, erc@saturn.upl.com 801/538-0177
-
- "There is nothing to seek and nothing to find. You're already enlightened, and
- all the words in the world won't give you what you already have. The wise
- seeker, therefore, is concerned with one thing only: to become aware of what
- he already is, of the True Self within." -- Zen maxim
- --
- Ed Carp erc@apple.com, erc@saturn.upl.com 801/538-0177
-
- "There is nothing to seek and nothing to find. You're already enlightened, and
- all the words in the world won't give you what you already have. The wise
-