Penetration Testing mailing list archives
Re: RF code scanners
From: Mister Coffee <live4java () stormcenter net>
Date: Wed, 23 Jun 2004 11:02:47 -0700
On Wed, Jun 23, 2004 at 08:58:38AM -0500, Ng, Kenneth (US) wrote:
Safe is tricky. Electronic door locks are supposed to fail open in case of fire or power failure.
That depends on the specific type of lock. Yes, many of them do fail-unlocked in case of power failure. But many of them, particularly in Exterior Facing situations will fail locked, but have a physical "safety bar" release on the inside. That solves the safety needs. Garage doors, gates, etc, are a different animal. Most electric garage doors I've encountered (and gates) can't be opened during a powerfailure without either physically forcing the device, or entering the garage and pulling a manual release lever. My curiosity here isn't how they'll behave in the case of power outage, but what happens when you overload the receiver's front end with 100+ * normal signal. Do they blow chunks and open? Simply reset and go silent for a while? Or make a premature trip to Silicon Heaven. Cheers, L4J
-----Original Message----- From: Mister Coffee [mailto:live4java () stormcenter net] Sent: Friday, June 18, 2004 12:38 PM To: Richard Rager Cc: Amit Deshmukh; pen-test () securityfocus com Subject: Re: RF code scanners On Thu, Jun 17, 2004 at 05:19:09PM -0600, Richard Rager wrote:On Thu, 17 Jun 2004, Mister Coffee wrote:That depends on what you're trying to do. Side note:http://www.radioreference.com/modules.php?name=News&file=article&sid=467Openers are decidedly susceptible to jamming...All FCC class C devices are susceptible to jamming. Look at wireless alarm systems.I wonder how many of these devices are designed to "Fail Open" when their receivers are overwhelmed. I don't imagine it would take much power to completely overload the front end of most garage door openers and the like. The "safe" way would be to "fail closed" of course, but we all know how security conscious most of the manufacturers out there are. Cheers, L4J
Current thread:
- RF code scanners Amit Deshmukh (Jun 16)
- Re: RF code scanners Mister Coffee (Jun 17)
- Re: RF code scanners Richard Rager (Jun 17)
- Re: RF code scanners Mister Coffee (Jun 22)
- Re: RF code scanners Richard Rager (Jun 17)
- Re: RF code scanners Richard Rager (Jun 17)
- <Possible follow-ups>
- Re: RF code scanners Maarten Van Horenbeeck (Jun 21)
- RE: RF code scanners Ng, Kenneth (US) (Jun 23)
- Re: RF code scanners Mister Coffee (Jun 24)
- RE: RF code scanners Ng, Kenneth (US) (Jun 23)
- Re: RF code scanners Mister Coffee (Jun 27)
- Re: RF code scanners Mister Coffee (Jun 17)