Thread View: comp.security.misc
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Started by rbowen
Wed, 04 Nov 1992 15:29
Encryption in a routed network?
Author: rbowen
Date: Wed, 04 Nov 1992 15:29
Date: Wed, 04 Nov 1992 15:29
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Are there any encryption devices that would allow the passing of encrypted traffic across a routed network? I have seen devices such as DEC's DECSNC, but it only will work in a bridged environment, not a routed one.
Re: Encryption in a routed network?
Author: Thomas Sippel - Dau
Date: Thu, 05 Nov 1992 15:36
Date: Thu, 05 Nov 1992 15:36
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In article <1992Nov4.092951.49@ntet.nctr.fda.gov>, rbowen@ntet.nctr.fda.gov writes:
- Are there any encryption devices that would allow the passing of
- encrypted traffic across a routed network? I have seen devices such
- as DEC's DECSNC, but it only will work in a bridged environment, not
- a routed one.
Which means it is an inept implementation. Encryption should be done at
presentation level, after normalization and compression.
If you want to avoid listeners at network or data link layers to analyse
your traffic patterns you could make sure that you connect over several
networks and hope your receiver dos so as well, and will consolidate the
messages.
For more info on layered communications, see A. S. Tanenbaum,
Computer Networks, Prentice Hall.
Thomas
--
*** This is the operative statement, all previous statements are inoperative.
* email: cmaae47 @ ic.ac.uk (Thomas Sippel - Dau) (uk.ac.ic on Janet)
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* snail: Imperial College of Science, Technology and Medicine
* The Center for Computing Services, Kensington SW7 2BX, Great Britain
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