RF code scanners

From: Amit Deshmukh (amit_deshmukh_at_bridgepoint.com.au)
Date: 06/16/04

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    To: <pen-test@securityfocus.com>
Date: Wed, 16 Jun 2004 09:57:12 +1000

    Has anyone had any experience with using radio frequency code scanners
    and/or grabbers to try and grab codes for garage doors and things like
    that?

    What's the sort of hardware used for this? Surely it cant be a matter of
    just cycling through the 2.4 Ghz (or appropriate) spectrum till u hit
    the right frequency and the door pops open! There is probably also a
    code burned into the firmware of the remote control device and the
    receiver which may need to match up.

    I've heard of other devices which sort of "code hop" and use a different
    code each time. Any vulnerabilities with those? (maybe they use an
    "industry-standard" algorithm?)

    Is it better to use a scanner or grabber with devices that use a static
    non-changing code?

    Cheers,
    Amit

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