Proxmark3 community
Research, development and trades concerning the powerful Proxmark3 device.
Remember; sharing is caring. Bring something back to the community.
"Learn the tools of the trade the hard way." +Fravia
You are not logged in.
Announcement
Time changes and with it the technology
Proxmark3 @ discord
Users of this forum, please be aware that information stored on this site is not private.
#1 2017-02-12 15:53:54
- ltq1990
- Contributor
- Registered: 2017-01-12
- Posts: 25
Reading different results from an Indala tag
Hi guys, today I try to read a Indala tag but got different results.
here are the results:
proxmark3> hw tune
Measuring antenna characteristics, please wait......#db# DownloadFPGA(len: 42096)
.
# LF antenna: 30.66 V @ 125.00 kHz
# LF antenna: 31.49 V @ 134.00 kHz
# LF optimal: 37.26 V @ 129.03 kHz
# HF antenna: 29.10 V @ 13.56 MHz
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.
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:
BitLen: 224
Indala UID=00000000000000000000000000000111100010010100100001011110010011101110100010110111011101001110011100010001010101100100101110101110011001001000011110101000101111100001110101110100010000000111000110010101110100010000111010101001 (789485e4ee8b774e711564bae6487a8be1d74407195d10ea9)
Valid Indala ID Found!
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:
BitLen: 224
Indala UID=00000000000000000000000000000111100010010100100001011110010011101110100010110111011101001110011100010001010101100100101110101110011001001000011110101000101111100001110101110100010000000111000110010100001011101111000101010110 (789485e4ee8b774e711564bae6487a8be1d744071942ef156)
Valid Indala ID Found!
I tried cloned different IDs into T5557 cards, it turned out the second one is the real ID. I don't understand how did it happen, does it have something to do with its irregular shape of the tag ?
Offline
#2 2017-02-12 16:00:25
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: Reading different results from an Indala tag
You're signal must be weak, it missed one phase shift on the first demod. With tagdata that long you need good strong signal.
Offline
#3 2017-02-13 08:11:50
- ltq1990
- Contributor
- Registered: 2017-01-12
- Posts: 25
Re: Reading different results from an Indala tag
You're signal must be weak, it missed one phase shift on the first demod. With tagdata that long you need good strong signal.
I think my atena works without any problems. Another thing is when I use pm3 to read the cloned tag, it can correctly reads the ID without any fails, however pm3 still fails to read the id sometimes or get different results
Offline
#4 2017-02-13 14:35:11
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: Reading different results from an Indala tag
Is the original tag a keyfob or smaller tag?
Offline
#5 2017-02-14 05:51:34
- ltq1990
- Contributor
- Registered: 2017-01-12
- Posts: 25
Re: Reading different results from an Indala tag
the original tag is in a bullet-alike form and the chip is a small piece attached to the end of bullet, so yea the original tag is smaller
Is the original tag a keyfob or smaller tag?
Offline
#6 2017-02-14 07:21:23
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: Reading different results from an Indala tag
That is probably why you are getting the results you are. Smaller tags tend to work better with small focused antennas not the general all around antennas that typically ship with the pm3 kits.
The tag it always works for is a larger tag?
Offline
#7 2017-02-15 01:45:43
- ltq1990
- Contributor
- Registered: 2017-01-12
- Posts: 25
Re: Reading different results from an Indala tag
That is probably why you are getting the results you are. Smaller tags tend to work better with small focused antennas not the general all around antennas that typically ship with the pm3 kits.
The tag it always works for is a larger tag?
I think the other result I was getting is false positive maybe.
However most of the times the false positive I got previously from that atena is like loads of zeros with an ID of few zeros
Offline
#8 2017-03-30 08:45:25
- Dot.Com
- Contributor
- From: Hong Kong
- Registered: 2016-10-05
- Posts: 180
- Website
Re: Reading different results from an Indala tag
The tag isn't a 224 bits that why. Use the build envt to demod the tag. you will get a fix result. 
Offline
#9 2017-03-30 13:10:57
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: Reading different results from an Indala tag
@dot.com,. Not sure what you are trying to say... his tag WAS 224 bits long. it was a long format indala tag.
Offline