[47044] in Cypherpunks
Re: Shimomura on BPF
daemon@ATHENA.MIT.EDU (Julian Assange)
Fri Jan 12 07:32:09 1996
From: Julian Assange <proff@suburbia.net>
To: jya@pipeline.com (John Young)
Date: Fri, 12 Jan 1996 23:23:09 +1100 (EST)
Cc: cypherpunks@toad.com
In-Reply-To: <199601120029.TAA28014@pipe3.nyc.pipeline.com> from "John Young" at Jan 11, 96 07:29:21 pm
> Shimomura on BPF, NSA and Crypto:
>
> One of the tools I modified for my work was a sophisticated
> piece of software called the Berkeley Packet Filter. ...
> Unlike the original BPF, my version was designed to bury
^^^^^^^^^^^^^^^^^^^^^^^
> itself inside the operating system of a computer and watch
> for certain information as it flowed through the computer
> from the Internet. When a packet from a certain address, or
> for that matter any other desired piece of information
> designated by the user flashed by, BPF would grab it and
> place it in a file where it could be kept for later
> viewing.
This is *exactly* what BPF does, always did and was designed to do. As
for writing the packets to a file, everything but opening and closing
the file are described in the man page. You could code it in 10 lines.
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