Re: Clipper for luggage

2003-11-19 Thread Bill Sommerfeld
[Moderator's note: With this, I'm ending all baggage messages for
now. --Perry]

  It will also mean more peace of mind for 
  passengers worried about reports of increased pilferage from unlocked bags.
 
 ... so, TSA people are stealing from unlocked bags.  

Not necessarily.  I was under the impression that there are also
non-TSA folks (airline-employed baggage handlers) in the
baggage-handling pipeline.

- Bill

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Re: Monoculture

2003-10-01 Thread Bill Sommerfeld
 Who on this list just wrote a report on the dangers of Monoculture?

An implementation monoculture is more dangerous than a protocol
monoculture..

Most exploitable security problems arise from implementation errors,
rather than from inherent flaws in the protocol being implemented.

And broad diversity in protocols has a downside from another general
systems security principle: minimization..

The more protocols you need to implement to talk to other systems, the
less time you have to make sure the ones you implement are implemented
well, and the more likely you are to pick up one which has a latent
implementation flaw.

- Bill

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Re: Attacking networks using DHCP, DNS - probably doesn't kill DNSSEC

2003-06-29 Thread Bill Sommerfeld
One key point though: even if DNSSEC was deployed from the root, and a
trusted copy of the root key was the client, the search path/default
domain must *also* come from a trusted source.

Currently, default domain/search path often comes from DHCP, and for
nomadic laptops where the relationship to the local network is often
casual at best, this is likely to be a mistake.

- Bill


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