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Thread: Difference between CB HSN and a C3 HSN

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    Senior Member CoopsOz's Avatar
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    Default Difference between CB HSN and a C3 HSN

    What is the difference between the two? I'm new to this and trying to take in as much as possible. Thanks.



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    Saintaholic's Avatar
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    I dont log but have read them. In the past from memory the string will come up as a C3 and you just replace the 3 for a B.
    Cheers, Saintaholic

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    CB applies when your card is updated as a group , so with a single command they adress all 256 cards in your group. C3 is when your card is singled out for special attention. Just my understanding of things but who knows i could be wrong.

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    Senior Member CoopsOz's Avatar
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    Thanks fellas. I guess it is moot at present since they are all either 18 or 38 byte strings, from reading I think they need to be 30. So one has to compare the string from today with one from a few days ago, remove the contaminating bytes and then GUP it to the card? Am I on the right track?

    BTW, the C3 hsn I've been seeing is one of the disclosed ones that people have let go in the past couple of days on the forum......I wonder if it's a kill command?

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    Quote Originally Posted by CoopsOz View Post
    So one has to compare the string from today with one from a few days ago, remove the contaminating bytes and then GUP it to the card? command?
    Exactly what i was thinking. Maybe not even GUP but just alter what is sent to the card on the fly. But which are the contaminating bytes, and are the contaminating portions dynamic or constant? Guess this is what the next task is - to find out.

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    Senior Member mickc's Avatar
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    but how do you stop the next command

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    Does anyone have the log from before friday they wish to share?

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