All Questions
Tagged with rfid contactless-smartcard
62 questions
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369
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How to Understand Access Conditions in Mifare Classic 1k
I am working with Mifare Classic 1K, and so far I have successfully inserted/updated data in each block using key A with default access byte FF0780.
I am trying to understand the documentation, but I ...
0
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0
answers
256
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Get AID from Debit/Credit Card using NFC
I just want to get AID from scanned debit/credit card, many apps are available on Google play store that easily gets the info on scan but i am unable to get the same. The purpose of getting the AID ...
0
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0
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288
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Can I edit the information placed on a RFID chip with the ISO 14443-4 Type A?
Can I edit the information placed on a RFID chip with the ISO 14443-4 Type A?
I’m trying to figure out if this is possible, and what hardware do I need to edit this type of chip, however, I can’t find ...
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1
answer
1k
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Can't write on NFC Tag after reading with Google's web NFC sample
I have a NFC Tag Mifare Classic 1k which I was using with NFC Tools for android, and stopped being able to write after reading with web NFC sample (see: https://googlechrome.github.io/samples/web-nfc/)...
- 1
1
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0
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709
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Mifare sector read-only
i have a MIFARE Classic EV1, and I can't write to sector 3 because it is read only. I have already made sure that the keys are correct
Any ideas on how can I write to it?
- 11
2
votes
1
answer
2k
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Cannot authenticate a sector in mifare card with correct key in android
I have a mifare classic 1K card and custom Key. But unable to read/write using it. Need help to find my mistake.
I have identified the key that is used to read/write the mifare card using NXP Taginfo ...
- 349
7
votes
1
answer
967
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Is it possible to implement a token queue in NFC cards?
This question is specifically about MIFARE Ultralight C/EV1, or MIFARE DESFire EV1, or even NTAG cards. I want to implement a system of tokens, so that each time a normal user reads one of those cards ...
- 465
1
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1
answer
3k
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MIFARE read-only & write protected block at the same time?
Which of MIFARE cards support a single block that can be programmed to require a password for writing, but is available to everyone for reading its data? And is such standard eligible on all platforms,...
- 465
1
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1
answer
1k
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Why is the length byte of this ATS so large?
Testing with a DESFire, I picked up the following ATS: 0x75 0x77 0x81 0x02 0x80.
From what I can tell, ISO/IEC 14443-4 says that the first byte should be the "length byte" and should indicate the ...
- 1,023
1
vote
1
answer
585
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Give HCE app priority over other NFC tags so that HCE becomes the only readable tag/first to be read
I have created an Android app which uses Host Card Emulation to emulate a contactless smartcard. Now, in a situation where both the real smartcard and the app are close to a reader, I would like to ...
- 111
1
vote
1
answer
3k
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What and where are historical bytes in a MIFARE's ATS?
What are historical bytes, and, given an ATS value, how can you tell which bytes are "historical"?
In my particular case, I've got the ATS of a MIFARE DESFire card. The ATS is 75 77 81 02 80. From my ...
- 1,023
1
vote
1
answer
898
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Does hf14b raw command allow me to send and receive APDU messages?
Undocumented in the Proxmark3's Wiki as well as in its command-line documentation, the proxmark3 Linux client provides the hf 14a apdu command (though there is no hf 14b apdu command).
The way I view ...
- 1,026
2
votes
1
answer
1k
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MIFARE Classic 1K - ATQA Size?
I'm actually doing some research on MIFARE Classic 1K cards but there is an information that I can't find.
What is the ATQA size on a MIFARE Classic 1K card? I found some document that indicates it's ...
- 23
4
votes
1
answer
5k
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What are Secure Access Modules (SAM) needed for?
I am working on understanding Secure Access Modules (SAM). Why are they needed? What is the difference between a SAM-based and SAM-less approach when used along with RFID card readers?
1
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1
answer
773
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Can I write a text on UHF RFID tag with RC522 module?
I want to write a text on a UHF RFID tag. Can I write with the RC522 module?
What software is appropriate for this work?
- 11