[SGVLUG] Security riddle

[matti]

oh great!

not only are we supposed to now have every
CERT in the world, but now we must be on
top of the riddles for job interviews!

lol

cheers
matti

--- On Mon, 11/23/09, Rae Yip <rae.yip at gmail.com> wrote:

> From: Rae Yip <rae.yip at gmail.com>
> Subject: Re: [SGVLUG] Security riddle
> To: "SGVLUG Discussion List." <sgvlug at sgvlug.net>
> Date: Monday, November 23, 2009, 1:43 PM
> Depends if your postal system uses
> DNSSEC or not. ;)
> 
> Seriously, the riddle has a better solution that doesn't
> involve
> putting the locks inside an unlocked box. If you eliminate
> some of the
> operations in the proposed solution, you'll arrive at the
> answer.
> 
> I can't claim any credit since I learned this one from a
> job interview.
> 
> -Rae.
> 
> On Mon, Nov 23, 2009 at 12:44 PM, Mike Rubel <mrubel at galcit.caltech.edu>
> wrote:
> > Is there any worry about a "man in the middle"
> intercepting the original
> > shipment and replacing your open lock with his own?
>  (Then replacing the
> > recipient's lock in the return shipment, and so
> forth?)
> >
> >> Send the unlocked box with one of your locks. the
> recipient places his
> >> lock
> >> inside and locks the box with your lock. You
> unlock the box with your key,
> >> put the item in the box and lock the box with his
> lock. he unlocks it with
> >> his key.
> >
> >
> >
>