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#1 2019-11-07 12:04:35
- yukihama
- Contributor
- Registered: 2018-05-13
- Posts: 133
[solved]first 4bytes of valid Mifare classic Block0 data ???
Hi
solved
for example:
printed card number is AH2378BC
then the valid block 0 data starting from BC7823AH
Last edited by yukihama (2019-11-09 09:09:38)
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#2 2019-11-07 17:02:20
- iceman
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- Registered: 2013-04-25
- Posts: 9,537
- Website
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
It would be easier if you had a larger sampleset to play with.
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#3 2019-11-08 03:38:37
- yukihama
- Contributor
- Registered: 2018-05-13
- Posts: 133
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
It would be easier if you had a larger sampleset to play with.
Hi Dear Mr iceman
have you played with it before?I have some data and thought they are some kind of CRC bits but tried many CRC alogorithm and failed....
Can you give me some hints about the algorithm of printed card number and valid block 0 data? I am grateful...
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#4 2019-11-08 11:59:47
- Onisan
- Contributor
- From: London
- Registered: 2016-07-18
- Posts: 88
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
Looks pretty straight forward.
Printed Card Number AH 23 78 BC (4 Byte ID)
Matches first 4 Bytes of MIFARE Card ID: BC 78 23 AH (in Reverse.)
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#5 2019-11-08 14:44:39
- yukihama
- Contributor
- Registered: 2018-05-13
- Posts: 133
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
[solved]valid Mifare classic Block0 data ???
Last edited by yukihama (2019-11-09 08:37:39)
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#6 2019-11-08 15:11:44
- iceman
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- Registered: 2013-04-25
- Posts: 9,537
- Website
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
try xoring all bytes together and see what you get
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#7 2019-11-09 08:36:33
- yukihama
- Contributor
- Registered: 2018-05-13
- Posts: 133
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
try xoring all bytes together and see what you get
Genuis please allow me to kiss your ass ，LOL
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#8 2019-11-09 09:30:14
- piwi
- Contributor
- Registered: 2013-06-04
- Posts: 704
Re: [solved]first 4bytes of valid Mifare classic Block0 data ???
This post would be more useful to others if you had not deleted the 5th byte and would correct the 'AH' byte.
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