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#1 2020-08-05 16:57:10

The_swon_men
Contributor
Registered: 2020-01-14
Posts: 16

Modification of an access bit line

Hello everybody,

I made a little mistake on my business mifare card.
Without paying attention I modified line 44 of block 10... The access bits have been modified too with the line /

hf mf wrbl 44 B 415A54454B4D BBBF9382EC757C92053CCAE47FE9ABCF

Problem: I can't modify them to have access to my sector 10 again...

Can you please tell me how to do it?

Thanks
Best regards
TSM

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#2 2020-08-06 06:08:46

mwalker
Moderator
Registered: 2019-05-11
Posts: 318

Re: Modification of an access bit line

Have a look at
https://cardinfo.barkweb.com.au/index.p … =19&sub=20
key in your "new" security bits and see what they mean.
Key A                A.Bits         KeyB
BBBF9382EC75 7C9205 3C CAE47FE9ABCF

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#3 2020-08-06 15:14:37

The_swon_men
Contributor
Registered: 2020-01-14
Posts: 16

Re: Modification of an access bit line

Hello, and thank you for your response,

If I understand correctly, I've locked an area and I can't read or write on it anymore... it's over, right?

Thanks

Last edited by The_swon_men (2020-08-06 16:19:01)

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#4 2020-08-07 09:02:51

Ollibolli
Contributor
Registered: 2019-04-27
Posts: 51

Re: Modification of an access bit line

Yes, it seems so...:-(

Do you have the original dump (before modify) of your business-card?

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#5 2020-08-07 13:19:31

The_swon_men
Contributor
Registered: 2020-01-14
Posts: 16

Re: Modification of an access bit line

Hello,

Of course I have a dump... the solution would be to put the dump on a Chinese card...
But I'm gonna try to do the dump at the Badge Department tongue

I'll let you know.

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