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- Newsgroups: sci.crypt
- Path: sparky!uunet!wupost!csus.edu!netcom.com!tcmay
- From: tcmay@netcom.com (Timothy C. May)
- Subject: Re: Demons and Ogres
- Message-ID: <1992Nov19.183618.8426@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- X-Newsreader: Tin 1.1 PL5
- References: <1992Nov19.060307.14063@colnet.cmhnet.org>
- Date: Thu, 19 Nov 1992 18:36:18 GMT
- Lines: 45
-
- Rob Stampfli (res@colnet.cmhnet.org) wrote:
- .....
- : Suppose the "annonymous informant", or the "expert" who doesn't know as much
- : as he thinks he knows, gives the authorities an encrypted message using a key
- : you have never seen before, but which, he alleges, originates from you.
- : Suppose the tap of your ISDN line misses a few bytes at the start of your
- : message. Under these conditions there is little you can do, even if you
- : desire to be cooperative. However, your failure to produce the desired
- : result would place you in considerable legal jeopardy under what is being
- : proposed here.
-
- Even better, when confronted with the intercepted ciphertext and
- commanded to product the plaintext, Alice says "OK, but where's the
- rest of it?"
-
- Her interrogators say "Huh?" She then explains that she split her
- message up into pieces and they must've missed some of them. Sorry,
- but there's nothing she can do about it.
-
- Can the authorities demand she reconstruct, from memory, the original
- message? Probably not, from my reading of the Constitution, from
- precedents about the 5th Amendment, and from the many messages on this
- topic.
-
- This just illustrates another impracticality of key registration,
- especially when crypto methods are mixed in with compression, packet
- systems, dynamic generation of keys, etc.
-
- I suspect the inevitable consequence of a key registration system
- would be severe restrictions on networks (all would be run by
- authorities), demands that messages be checksummed and signed be
- government authorities, and even that plaintext be archived and
- produced late under court order.
-
-
-
- --Tim May
- --
- ..........................................................................
- Timothy C. May | Crypto Anarchy: encryption, digital money,
- tcmay@netcom.com | anonymous networks, digital pseudonyms, zero
- 408-688-5409 | knowledge, reputations, information markets,
- W.A.S.T.E.: Aptos, CA | black markets, collapse of governments.
- Higher Power: 2^756839 | PGP Public Key: awaiting Macintosh version.
-
-