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- Newsgroups: sci.crypt
- Path: sparky!uunet!usc!cs.utexas.edu!sun-barr!ames!purdue!news.cs.indiana.edu!att!mcdchg!chinet!schneier
- From: schneier@chinet.chi.il.us (Bruce Schneier)
- Subject: Re: How fast is DES?
- Message-ID: <C0q8EH.1zn@chinet.chi.il.us>
- Organization: Chinet - Public Access UNIX
- References: <TODD.93Jan11151650@palomar.tivoli.com>
- Distribution: sci
- Date: Tue, 12 Jan 1993 05:54:17 GMT
- Lines: 20
-
- In article <TODD.93Jan11151650@palomar.tivoli.com> todd@palomar.tivoli.com writes:
- >
- >In <1494@eouk9.eoe.co.uk>, Andrew Haley (ahaley@eoe.co.uk) writes
- >
- >> Another possibility is using a hash function such as MD4 as a stream
- >> cipher generator. One advantage of using stream ciphers is that the
- >> stream can be generated offline, so that when you want to transmit a
- >> message it can be done instantly. The total processing time to
- >> encrypt will not be any less, but the stream can be generated while
- >> the processor would otherwise be idle, effectively reducing the
- >> encryption overhead to zero.
- >
- >I'm not sure how practical this technique is, I believe that IBM owns
- >a patent on it. And it won't be expiring for even further in the
- >future than the RSA patents!!!
- >
- Does anyone know if this is true or not? If it is true, does anyone have
- a patent number?
-
- Bruce
-