Firewall Wizards mailing list archives
Re: SCADA
From: Dotzero <dotzero () gmail com>
Date: Wed, 15 Apr 2009 09:49:05 -0400
On Tue, Apr 14, 2009 at 6:49 PM, Marcus J. Ranum <mjr () ranum com> wrote:
Paul D. Robertson wrote:The other side of the coin is that adding layers adds complexity and code- and adding code adds bugs- so you don't *always* get a net security gain by adding "protecion."You raise a problem that I've spent too much time pondering. In effect, it refutes the "conventional wisdom" of computer security. Which goes as follows: Item #1 - Defense in depth is good Item #2 - Complexity is the enemy of security If #2 is true, #1 can't be, because defense in depth adds complexity. Puzzled, mjr. --
Perhaps a more nuanced discussion on the nature of complexity is in order. If I perform 5 simple but very beneficial (Securitywise) things to achieve better defense in depth, how much complexity have I really added compared to implementing 5 very intricate things? There will always be a set of tradeoffs to consider. Where one ends up depends very much on where one thinks one is going. _______________________________________________ firewall-wizards mailing list firewall-wizards () listserv icsalabs com https://listserv.icsalabs.com/mailman/listinfo/firewall-wizards