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#1 2019-02-19 06:35:39

lovelost
Contributor
Registered: 2019-01-24
Posts: 3

34-bit N10002

There are some N10002 access cards on my hand. The card number printed on the card or read on the access controller is like this: 008-04-0654501, but I read 3 cards with PM3, the numbers are as follows :

(008-04-0654501)
HID Prox TAG ID: 261093f94b (64677) - Format Len: 34bit - FC: 2121 - Card: 64677         
[+] Valid HID Prox ID Found!

(008-04-0654502)
HID Prox TAG ID: 261093f94d (64678) - Format Len: 34bit - FC: 2121 - Card: 64678         
[+] Valid HID Prox ID Found!

(008-04-0654503)
HID Prox TAG ID: 261093f94e (64679) - Format Len: 34bit - FC: 2121 - Card: 64679         
[+] Valid HID Prox ID Found!

Does anyone know how to convert between 008-04-06540x format and FC+Card Number format? Thanks a lot.

Last edited by lovelost (2019-02-25 06:15:23)

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#2 2019-02-23 22:18:11

grauerfuchs
Contributor
Registered: 2018-08-28
Posts: 50

Re: 34-bit N10002

Using the second example above, it looks like it's a simple bitwise interpretation of the data. Here's the complete set of data transmitted by the card, decoded both using the HID card format and also by the written text on your card:

   2   6   1   0   9   3   f   9   4   d (RFID Sequence HEX)
0010011000010000100100111111100101001101 (RFID Sequence BIN)
00H00L                                   (HID Header)
      PFFFFFFFFFFFFFFFFNNNNNNNNNNNNNNNNP (N10002 Card Format)
       AAAAAAAABBBBCCCCCCCCCCCCCCCCCCCC  (Written Data)
       00001000                          (Written Group A)
               0100                      (Written Group B)
                   10011111110010100110  (Written Group C)
         008    04         0654502       (Written data DEC)

Key:
  H: HID standard header bit; Always 1 when card length is < 37 bits
  0: Padding/block alignment bits present in HID card header
  L: Leading bit; not part of card format but indicates begin of data
  P: Parity
  F: Facility Code
  N: Card Number
  A: Written group A
  B: Written group B
  C: Written group C

Last edited by grauerfuchs (2019-02-24 18:35:23)

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#3 2019-02-25 06:15:04

lovelost
Contributor
Registered: 2019-01-24
Posts: 3

Re: 34-bit N10002

Understand, thanks a lot.

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#4 2019-05-15 09:30:23

Nubian
Contributor
Registered: 2018-03-23
Posts: 11

Re: 34-bit N10002

Parity looks different from N10002

2      6     1     0      9     3      f      9      4     d (RFID Sequence HEX)
0010011000010000100100111111100101001101 (RFID Sequence BIN)
00H00L                                   (HID Header)
      (EP)FFFFFFFFFFFFFFFFNNNNNNNNNNNNNNNN(0P) (N10002 Card Format)

EP should be 0
2        4      1      0       9      3       f       9      4      d
0010 0100 0001 0000 1001 0011 1111 1001 0100 1101

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