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- Path: sparky!uunet!mcsun!uknet!cam-cl!cam-cl!rja14
- From: rja14@cl.cam.ac.uk (Ross Anderson)
- Newsgroups: sci.crypt
- Subject: Re: well braid
- Message-ID: <1992Aug18.105437.4617@cl.cam.ac.uk>
- Date: 18 Aug 92 10:54:37 GMT
- References: <13989@elevia.uniforum.qc.ca>
- Sender: news@cl.cam.ac.uk (The news facility)
- Reply-To: rja14@cl.cam.ac.uk (Ross Anderson)
- Organization: U of Cambridge Computer Lab, UK
- Lines: 20
-
-
- In <13989@elevia.uniforum.qc.ca>, alain@elevia.uniforum.qc.ca (W.A.Simon)
- writes:
-
- > The proposed system works by multiplexing (braiding) two or more bit
- > streams. Depending on the value of key bits, the next bit of output
- > is taken from one or the other input.
-
- Something similar has been around in the world of stream ciphers since
- about 1980. It was demolished in
-
- `Solving a class of stream ciphers', Cryptologia vol XIV no 3 (July 1990)
- pp 285 - 288.
-
- As far as I can see, your system will have to be modified to withstand
- this kind of attack.
-
- Hope this helps
-
- Ross
-