Great Circle Associates Firewalls
(October 1996)
 

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Subject: Re: Financial transactions and firewalls.
From: "Marcus J. Ranum" <mjr @ v-one . com>
Organization: V-ONE Corp, Baltimore Office
Date: Tue, 8 Oct 1996 01:53:39 +0000
To: carson @ lehman . com
Cc: firewalls @ GreatCircle . COM
Comments: Authenticated sender is <mjr @ mail . clark . net . >

Carson writes:
> My message was not meant to convince the world that FIX is a magnificent
> gift to mankind, only that FIX, possibly unlike SWIFT, _has_ undergone
> severe security reviews by several large investment banks. The first draft
> of the protocol waved several hands and said that the protocol will be
> secure. That did _not_ go over well.

The first draft of the protocol was the one I was referring to as 
being the sub-optimal one. I haven't looked at the latest version so 
I really shouldn't comment (and I should have been more specific in 
my first comments).  I also don't know, but am concerned about, 
possible penetration/implementation of the first version. One of the 
things that tends to compound protocol security nightmares is the 
early adopters who then refus to upgrade. :)

> written by a consulting firm hired by members of the FIX consortium, and
> supposedly includes strong encryption. As I haven't reviewed the source
> code, I can't say if they got it right or not, but it is more than security
> by vigorous assertion.

And, in some cases, its assertion by virtue of obscurity. It's really 
unfortunate that there are still a LOT of people who expect the 
security expert to buy an argument like: "the protocol is too 
complicated for anyone to crack or spoof correctly."   Uh-huh. Yeah. 
Especially if it's a standard.

> For all I know, all of the above has changed and they're now trusting
> a Psychic Hotline to notify them of security problems, but I doubt it.

Carson, Carson, Carson -- psychics for security are completely
passe!! All the real experts these days are using voodoo. Papa Legba 
review dis' code!

mjr.
[In case anyone's been wondering about my sudden activity level, it's 
because I've finally gotten around to installing a detached mailer on 
my laptop. This week and next week I will be spending a LOT of time 
in airplanes! :)]

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