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- Newsgroups: sci.crypt
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!data.nas.nasa.gov!sun425.nas.nasa.gov!thompson
- From: thompson@sun425.nas.nasa.gov (Keith C. Thompson)
- Subject: Re: New Encryption Method - A Challenge!
- References: <n0e48t@ofa123.fidonet.org>
- Sender: news@nas.nasa.gov (News Administrator)
- Organization: NAS, NASA Ames Research Center, Moffett Field, California
- Date: Sat, 14 Nov 92 01:56:10 GMT
- Message-ID: <1992Nov14.015610.11789@nas.nasa.gov>
- Lines: 48
-
- In article <n0e48t@ofa123.fidonet.org> Erik.Lindano@ofa123.fidonet.org writes:
- >
- > Well, I said I wouldn't, but I went and read Loen's long FAQ post
- > anyway. Just to show that I am equanimous. According to what I glean
- > from his words, decrypting NuCrypt output should be an absolute,
- > total, unmitigated pea-soup task for any self-respecting
- > cryptologist (-grapher?). The challenge opened widely nearly every
- > fundamental avenue of attack, as mentioned in Loen's post:
- >
- > 2. "Known plaintext" attack. The NuCrypt challenge offers complete
- > availability of the original plaintext, except one word or two.
- > You are only asked to decrypt this ONE WORD or TWO, nothing
- > more! Plain English. Eight chars. Piece of cake.
-
- Well, technically this is not a "known plaintext" attack that you are
- offering. The idea with a known plaintext attack is to recover the
- key, not part of the plaintext. This sort of misunderstanding on your
- part is what is driving the reaction that you are seeing. Sorry to
- be so blunt.
-
- >
- > 3. "Chosen plaintext" attack. Analysts have been invited to submit
- > plaintext of their own choosing - 99%! Only ONE unknown word
- > would be ebedded in your own plaintext, and the whole then
- > encrypted. You are only asked to decrypt this ONE WORD having
- > both the plaintext and ciphertext of ALL OTHER WORDS. What
- > could be easier?
-
- See the comments above. Same problem.
-
- > 6. To make things REAL easy, you've been asked to suggest any other
- > input or test method of your own choosing.
-
- Well, I have. You did not respond to my email, although I have no
- way of knowing if you received it, but I have received no responses.
-
- >
- > Ach, meine Damen un Herren... all these cryptomancers, I mean,
- > cryptopterists, and no takers! No takers... shame. People here
- > seem to have a very low cryptolibido. Lack of cryptamines, maybe.
- >
- > My friend says he's considering adding the cost of a roundript ticket
- > to New York City to the wining-and-dining prize.
-
- Well, he is getting closer to the point were somebody is going to take
- him up on it.
-
- - Keith
-