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Thread: Thumb print car starter

  1. #41
    Variable Bitrate roadhog's Avatar
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    Not sure if I understand you correctly, but if the thief removed the relay and shorted the wires would the fuel pump not run as normal? If so I don't think any security system could rely on a relay or two, the computer would need to be more integrated with the PCM or similar.

  2. #42
    My man uses Levitra. Peoples's Avatar
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    Quote Originally Posted by roadhog
    Not sure if I understand you correctly, but if the thief removed the relay and shorted the wires would the fuel pump not run as normal? If so I don't think any security system could rely on a relay or two, the computer would need to be more integrated with the PCM or similar.

    funny, vipers / compustars....etc....all rely on relays.....the starter immobilizers are simple relays. and if you install a transponder(remote start), you're asking for trouble. Now its as simple as bypassing that relay, and hotwiring a car like in the good 'ol days.

    people keep missunderstanding the method I explained. The feul like wire would never be cut (by the relay), until someone missed the security code. After this...its off. Removing the computer wont help, unless they find the relay connected to the feul line and bypass it. Disabling the computer before the relay cuts off the feul line would be a way to bypass it. But in this case, the theif would have to know its there. Once they attempt to start (without looking for the feul cuttoff relay, or disabling the computer) its too late.
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  3. #43
    My man uses Levitra. Peoples's Avatar
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    Quote Originally Posted by BoraXP
    wow first attempt at this was horribly scattered lets try this again:

    i was just giving em trouble thats all
    i wasnt taking anything serious

    get safe

    hack it up find out where unlock signal comes from
    throw that into a timer relay (when given power the relay holds circut for predetermind amount of time)
    this arms a pushbutton start

    then after 30 seconds it cancels the circut to the pushbutton start
    if the car is on it stays on
    if the car didnt start the start button wont work till fingerprint is done again...

    bla bla bla

    this method would require the fingerprint reader to be autonomous of the computer
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  4. #44
    Maximum Bitrate BoraXP's Avatar
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    yeah it is check the link

  5. #45
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    couldnt you use a finger print scanner like the microsoft one, and then figure out what signal it sends out for the finger print and then make a lil board that would read the signal and trigger a relay thats hidden somewhere to turn on the fuel pump? This would eliminate a few problems first being price, second being reliant on the carputer, and third by hiding the relay somewhere no theif will ever find it unless they tow your car away and have the time to strip it to find out how it all works and even then prolly wont understand it

  6. #46
    Maximum Bitrate BoraXP's Avatar
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    its usb i believe

    the scanning is software based

    when/If i get my next car i will keep an eye out on ebay for a biometric safe and give my way a try

    i fully intend to keep the key to arm the car.

    and no matter what way we pick the car can be hotwired

  7. #47
    Variable Bitrate roadhog's Avatar
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    Afaik the pc fingerprint readers are usb, requiring a usb host. A dedicated board sounds more reliable than a windows box...

    I take the point that other systems may well rely on relays. I suppose like just about any security, once you find the lock it's only a matter of time before it gets cracked. I guess the best defense is disguise... dummy circuitry, more relays etc etc.

  8. #48
    Variable Bitrate roadhog's Avatar
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    UK fords have used transponder keys for some years now, without the transponder you're stuck. Not sure but I believe they go into the PCM, and I imagine that's more trouble to figure out than it's worth for a potential thief.

  9. #49
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    Quote Originally Posted by roadhog
    Not sure if I understand you correctly, but if the thief removed the relay and shorted the wires would the fuel pump not run as normal? If so I don't think any security system could rely on a relay or two, the computer would need to be more integrated with the PCM or similar.

    There are tow discussions going on. Security and Implementation and failsafe.

    Any security measure can be overcome, it is a matter of time and patience.

    Getting the system to work is easy, getting it to work 100 percent of the time is not.

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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    Quote Originally Posted by Peoples
    people keep missunderstanding the method I explained. The feul like wire would never be cut (by the relay), until someone missed the security code. After this...its off.
    What keeps it off? In order to keep a relay energized, it must have signal. According to your system, the computer somehow provides the signal. Easy, if the computer is on, BUT, if the computer is off, or removed, then what supplies the signal to the relay?

    Quote Originally Posted by Peoples
    Removing the computer wont help, unless they find the relay connected to the feul line and bypass it. Disabling the computer before the relay cuts off the feul line would be a way to bypass it. But in this case, the theif would have to know its there. Once they attempt to start (without looking for the feul cuttoff relay, or disabling the computer) its too late.
    Again, if they see the screen, and notice the need for a code, they will just rip out the computer. What will keepthe car from starting with out the computers signal to the relay.
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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