defeating traffic analysis
Date: Tue, 19 Oct 93 22:43:46 PDT From: hfinney@shell.portal.com (Hal Finney) Message-Id: <9310200543.AA22959@jobe.shell.portal.com.shell.portal.com> Subject: Re: JUDGMENT PROOFING
This is exactly what anonymous remailers are for - to defeat traffic analysis. The goal is a situation where you, and everyone else, receives and sends out a bunch of encrypted traffic every day. There will be no way a snooper can find out exactly what you are reading, what you are writing, or whom you are communicating with. That's what I call private.
To really defeat traffic analysis you also have to remove any information from volume of traffic. If I don't know any message routing but I do know that cme sent 10 MB of traffic and you received 10 MB of traffic and the other 30 people on the anon subnet dealt with only 100B each, .... So: have everyone send and receive exactly the same size message to/from the same sites at the same time every day. - Carl
# From: cme@ellisun.sw.stratus.com (Carl Ellison) # # So: have everyone send and receive exactly the same size message to/from the # same sites at the same time every day. That seems so unfortunate that the "average utilizaton" and the "peak throughput" [I use quotes because I may have the wrong technical buzzwords, but you know what I mean] have to be one and the same. I've been trying to think of ways around that. Am I wasting my time? I've thought of trying to find probabilistic ways of letting you vary how much your read/write to the net each day, maintaining some constant statisics (average amount you read/write, standard deviation, ...), that allows you one day to read a lot more than the average, when you need to, without giving away that it was useful information instead of padding. But I'm afraid it still gives away partial bits of information -- it is still likely that the hungriest readers and the most verbose writers match up. This becomes more on my mind, as I work on DCNet protocols. References? Advice? strick
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cme@ellisun.sw.stratus.com -
henry strickland