[114711] in cryptography@c2.net mail archive
Re: Gutmann Soundwave Therapy
daemon@ATHENA.MIT.EDU (Steven M. Bellovin)
Wed Feb 6 20:26:02 2008
Date: Wed, 6 Feb 2008 18:43:19 +0000
From: "Steven M. Bellovin" <smb@cs.columbia.edu>
To: "Leichter, Jerry" <leichter_jerrold@emc.com>
Cc: Eric Rescorla <ekr@networkresonance.com>, "James A. Donald"
<jamesd@echeque.com>, <krstic@solarsail.hcs.harvard.edu>, Guus Sliepen
<guus@sliepen.org>, Cryptography <cryptography@metzdowd.com>
In-Reply-To: <Pine.SOL.4.61.0802040907080.6841@mental>
On Mon, 4 Feb 2008 09:33:37 -0500 (EST)
"Leichter, Jerry" <leichter_jerrold@emc.com> wrote:
> The NSA quote someone - Steve Bellovin? - has repeated comes to mind:
> Amateurs talk about algorithms. Professionals talk about economics.
> Using DTLS for VOIP provides you with an extremely high level of
> security, but costs you 50% packet overhead. Is that worth it to you?
> It really depends - and making an intelligent choice requires that
> various alternatives along the cost/safety curve actually be
> available.
>
Precisely.
Some years ago, I did a crypto design for a potential product. As best
we could figure it, the extra overhead for a standard mechanism versus
a custom one was greater than the profit margin for this product.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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