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Thread: Secure Entry

  1. #1
    Automated Home Legend chris_j_hunter's Avatar
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    Default Secure Entry

    'wondered if anyone had a way that would allow an Idratek installation to look after secure entry - on-foot through front- or back-door or in-car into garage, via buttons or remotes or tags or whatever ?

    when on-foot, could a DIO module could be used with push-buttons - with defined sequences, to trigger a solenoid ?

    maybe yes, but how secure would it be ?

    equally, how secure are garage-door remotes / operators ?

    could both be made more secure by having Cortex allow operation only within defined time-slots, and when defined presence criteria are met (eg: someone's home), and/or a pre-arranging e-mail has been received ?

    having at least one door worked by mechanical key would still be more than a good idea, to cope with power-cuts & PC crashes, etc ...

    any thoughts ?

  2. #2
    Automated Home Guru Geps's Avatar
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    As much as I love Idratek.....I don't think it's suitable for this.

    You can get locks with a microswitch built it so I'd use one of those on a door and then I'd use Idratek to email me etc when it was opened.

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    Moderator toscal's Avatar
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    Quote Originally Posted by chris_j_hunter View Post
    '

    equally, how secure are garage-door remotes / operators ?

    any thoughts ?
    The remotes on the ones we used to install where very difficult to copy. In fact out of the 5 places locally that offered key fob copying services non could copy them. They had a digital rolling code type. This gave something like 18 billion billion possible code combinations.
    The control units also had the possibility of adding contact closures for open and close, so could be interfaced with virtually any HA system.
    IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
    www.casatech.eu Renovation Spain Blog

  4. #4
    Automated Home Legend chris_j_hunter's Avatar
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    yep, rolling-code remotes seem a good idea ...

  5. #5
    Automated Home Guru Geps's Avatar
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    I work in the automotive security industry and work with these technologies on a daily basis. Rolling code attacks used to be done on the theory of you send consecutive challenges and wait for it to work, but alot of research has been done and most of the most popular generators have been cracked meaning you often need just two reads from the original and you can calculate the seed value and thus clone it.

    We're starting to see on some of the more popular makes now the use of mutual authentication so both parties know they're talking to a genuine device.

    Had I had more time it's something I'd be very interested in, but work, combined with my house renovation and finishing off my Idratek controlled socket design mean I just don't have any time for yet another project atm.

  6. #6
    Automated Home Legend chris_j_hunter's Avatar
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    interesting ... maybe that reinforces the idea of having Cortex narrow the windows of opportunity, by having the operator powered-on only when likely to be necessary (the Hörmann operator re-zeroes itself by fully opening, so losing reference during power-off shouldn't be a problem) ...
    Last edited by chris_j_hunter; 23rd April 2011 at 10:16 AM.

  7. #7
    Automated Home Legend chris_j_hunter's Avatar
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    >locks with a microswitch built-in ...

    had looked & found none, but looking again showed it to be an option with some doors we've been considering :

    http://www.modern-doors.co.uk/Access...lock-p378.html

    so thanks !

  8. #8
    Automated Home Guru Geps's Avatar
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    Rolling code are typically transmit only though so switching off the receiver wouldn't make any difference.

  9. #9
    Automated Home Guru Geps's Avatar
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    Yup that's the type. If you were to get enough people together we could possibly arrange a group buy through my work as we have a trade counter and supplier nearly all the leading manufacturers.

    Typically though, they're not that often bought so it's not something we'd stock.

  10. #10
    Automated Home Legend chris_j_hunter's Avatar
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    >rolling code are typically transmit only ... switching off the receiver wouldn't make any difference ...

    'thought though was that it would limit when an illicit remote could be used, to times when people might be about ...

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