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Code-hopping car alarms

Discussion in 'Security Alarms' started by globalspy, Jul 7, 2004.

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  1. globalspy

    globalspy Guest


    Does anybody know the specifics on how these work? As in what technology
    is used in the car alarms that have code-hopping. RSA signature, one
    time passwords, etc?


  2. Hi

    I used to build my own alarms as a kid, with stuff that fell to the
    ground when doors were opened; by stretching cords throughout rooms; by
    invisibly sealing cupboards to detect if they had been opened...

    lots more of these detective/surveillance/security plays like noting
    numbers of cars passing by....

    Probably inspired by mickey mouse and other mags, but as well inventing
    stuff by myself.

    My question is now: Did any of you continue to invent and build your own
    homemade low-tech alarm systems (or know of people who did so) and are
    any descriptions or pictures of these systems available? I'm interested
    in stuff worth reading on this toppic as well...

    The reason for my post:

    I'd like to develop such a system of my own from damaged household
    appliances/ car and computer parts..., so I'm interested in your
    experiences and hope for "massive" responses to inspire me and extend my

    Please let me know if you think this is the wrong newsgroup to post my


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