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- Xref: sparky sci.crypt:3090 comp.security.misc:1140
- Path: sparky!uunet!mcsun!uknet!acorn!eoe!ahaley
- From: ahaley@eoe.co.uk (Andrew Haley)
- Newsgroups: sci.crypt,comp.security.misc
- Subject: Re: "Sneakers" -- action/adventure movie about Cryptography
- Message-ID: <1391@eouk18.eoe.co.uk>
- Date: 3 Sep 92 09:41:22 GMT
- References: <1992Sep1.060412.14956@fig.citib.com>
- Organization: EO Europe Limited, Cambridge, UK
- Lines: 53
- X-Newsreader: Tin 1.1 PL3
-
- gjb@fig.citib.com (Greg Brail) writes:
-
- [... deleted ...]
-
- : So -- as I've come to expect from Hollywood, most of the technical
- : details in the book (and I assume the movie), are either impractical,
- : impossible, or nonexistent. (There are a few neat tricks shown, however.)
- : But let's assume someone does figure out how to trivially factor very
- : large numbers. I understand that would defeat RSA. Am I correct?
-
- Yes. The decryption key is trivially obtainable from the factors of
- the public modulus.
-
- : How about DES?
-
- No. DES does not use problems in number theory.
-
- : Are other common government and commercial cryptosystems based on
- : large primes? I assume that one-time pads would still be quite effective.
-
- Certainly. Some cryptosystems (e.g. the proposed NIST signature
- standard) are based on the discrete logarithm problem, which is
- generally thought to be of similar difficulty to factoring large
- primes. It is possible that any breakthrough in number theory which
- broke RSA could also be used to perform discrete log.
-
- One time pads will always be effective.
-
- : And how about this "Russian codes are different" stuff? Any truth to this?
-
- No idea.
-
- : I understand one can buy source code for DES and RSA on the streets of
- : Leningrad (according to Communications of the ACM).
-
- Source code is available by anonymous FTP. Anyone with anonymous FTP
- access in Leningrad could pick it up for free. Papers discussing
- efficient algorithms are freely available worldwide.
-
- : Someday someone will produce a computer-cracking scene in a movie that
- : looks as if the people involved have logged in to a system via a modem
- : at least once in their lives. I don't think "Sneakers" will be it.
- :
- : greg
- :
- : P.S. If no one agrees that the technical details in this movie are silly,
- : I'd be glad to post more.
-
- I agree, it's silly. Please, no more! :-)
-
- Andrew.
-
- P.S. Aren't the actors in the movie a little old to be hackers?
-