1997-06-20 - Re: Recipient Anonymity

Header Data

From: nobody@REPLAY.COM (Anonymous)
To: cypherpunks@cyberpass.net
Message Hash: d8d7611dd543c73154817c4530ac0c866a91140fe3e8e8afbf3b7616e15fc123
Message ID: <199706200219.EAA06517@basement.replay.com>
Reply To: <199706180825.BAA20903@myriad.alias.net>
UTC Datetime: 1997-06-20 02:27:48 UTC
Raw Date: Fri, 20 Jun 1997 10:27:48 +0800

Raw message

From: nobody@REPLAY.COM (Anonymous)
Date: Fri, 20 Jun 1997 10:27:48 +0800
To: cypherpunks@cyberpass.net
Subject: Re: Recipient Anonymity
In-Reply-To: <199706180825.BAA20903@myriad.alias.net>
Message-ID: <199706200219.EAA06517@basement.replay.com>
MIME-Version: 1.0
Content-Type: text/plain



ghio@temp0099.myriad.ml.org (Matthew Ghio) wrote:

> You could also use MD5 hashes of the messages, in which case a list of
> 1000 message-IDs would take only 16K.  (In the unlikely event of a hash
> collision you could download those two messages seperately.  Unless the
> number of messages was huge (millions), you could probably get away with
> using only a 32 or 64-bit hash function.)

Okay.  Let's suppose that there are 10,000 messages (more realistic for a
large remailer i think)  And I am going to spread it over five servers,
And I use a 32-bit hash function (one in four billion chance I get someone
else's message)

First I download the list of Message IDs/Hashes. (40,000 bytes)
Then I download the recipient list. (another 40,000 bytes)
I find a message for me.  Let's suppose the messages are 20K each.
I send each server a list of the messages I want (10,000 bits, which is
1,250 bytes each, so 6,250 bytes total)
Finally, I get back five 20K messages from each of the five servers.

So that's a total of 80K to download the IDs/recipients lists, 6.25K to
upload the requests, and 100K to download the message pieces, to read my
20K email.  I guess that could work.






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