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#1 2019-06-20 08:37:41

AlexPS
Contributor
Registered: 2019-06-18
Posts: 2

EM4100 - Pattern 1

Hi everyone,

I want to number some cards with a pattern I get on my PM3, but i just wondering where this number come from,

Is the Pattern 1: 14448055 [0xDC75B7], is something related with the tag ID? How is created?


Card Reading:

proxmark3> lf search  
Reading 30000 bytes from device memory
Data fetched          
Samples @ 8 bits/smpl, decimation 1:1           
NOTE: some demods output possible binary
  if it finds something that looks like a tag          
False Positives ARE possible
Checking for known tags:
EM410x pattern found:           
EM TAG ID      : 010B7AB7CE          
Unique TAG ID  : 80D05EED73          
Possible de-scramble patterns          
HoneyWell IdentKey {          
DEZ 8          : 08042446          
DEZ 10         : 0192591822          
DEZ 5.5        : 02938.47054          
DEZ 3.5A       : 001.47054          
DEZ 3.5B       : 011.47054          
DEZ 3.5C       : 122.47054          
DEZ 14/IK2     : 00004487559118          
DEZ 15/IK3     : 000553251695987          
DEZ 20/ZK      : 08001300051414130703          
}
Other          : 47054_122_08042446          
Pattern Paxton : 26146254 [0x18EF5CE]          
Pattern 1      : 14448055 [0xDC75B7]       
Pattern Sebury : 47054 122 8042446  [0xB7CE 0x7A 0x7AB7CE]          
Valid EM410x ID Found!          
proxmark3>

Thanks for your help!
Alex

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#2 2019-06-21 01:28:01

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

Re: EM4100 - Pattern 1

I believe all values are derived from the Tag ID. 

Have a look in the source code for the proxmark3 client.
File : cmdlfem4x.c
Function : printEM410x

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