All very well having all this stuff, but provided you don't make the system
public knowledge, it really shouldn't be that bigger issue. If people are
that determined, they will find a way to get around the system. A PIN should
be fine, just don't make the system public knowledge. If the criminal
doesn't even know the system exists, then they won't try to circumvent it.

---
Regards,
Chris Pringle
Administrator of "The Linux Site"
http://thelinuxsite.sourceforge.net



-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Roman Black
Sent: 18 April 2001 16:58
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: Need some help with a PIC monotoring system


Alan B. Pearce wrote:
>
> >Hmm.  So a group of thieves would only need to surprise the guard on his
> >rounds, tie him up somewhere, then have one guy walk around as usual with
> >the ID tag.  Meanwhile the rest of the gang has all weekend to clean the
> >place out.
>
> Which is why he needs to use it to log in at the guard house at the end of
> the round. If he does not then an alarm should be raised to the security
> company premises as originally mentioned. If the gang can get into the
guard
> house to do this then there is a problem in the way the system is
> implemented which is beyond any logging system. If the ID unit is used as
a
> key system to gain access then that is also a security flaw unless used
with
> some sort of PIN system.
>
> It may be that using a PIN number at each logging point would help with
any
> security problem, but this is still not a total solution.


Maybe a bar code attached to the Guard, ie ink stamp on
the forearm, could be checked at each station. Maybe in
conjunction with a new pin number for that day??

Keep in mind that any "key" devices can be removed from
the guard, even "knowlege" systems can be compromised if
they interrogate the guard. All you can do is make it
more complex to hack the system.

I watched the mafia movie "Goodfellows" the other night,
they paid off the guards and got tips and passwords that
way. Extremely easy. So how much do your guards take home
each week?? Any of them got mortgages?? Are they willing
to "look the other way" for $5,000 in cash, etc??
:o)
-Roman

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