xDF DESFire EV1 2kB NFC
Sometimes we find stuff lying around HQ–these are a limited quantity, one off product.
- 13.56MHz ISO14443A & NFC Type 4 chip
- Ample 2kB multi-application memory space
- 3x13mm cylindrical sterile bioglass implant
- Want an analog? Check out the STL.
- RFID Diagnostic Card and xFD included!
$149.00
More Details
WARNING This kit definitely contains dangerous things. While the xDF chip has undergone several quality checks during manufacture and has been put through a battery of tests, it has not been certified by any government regulatory agency for implantation or use inside the human body. Use of this device is strictly at your own risk.
The xDF NFC chip implant is an ISO14443A NFC Type 4 compliant transponder. It works with NFC enabled smartphones, certain commercial access control systems, various ISO14443A compatible door locks, as well as USB contactless ISO14443A readers. The DESFire EV1 is a powerful chip, capable of doing much more than simply holding NDEF record data for simple NFC applications. The true utility of this chip is best utilized by programmers and engineers, but there’s also nothing wrong with storing a lot of NDEF data on it either. The xDF has enough space you could store a vCard digital business card complete with all your contact information and even a small tiny photo of yourself on this chip.
The xDF also comes with some additional goodies, including a xFD field tester, and the RFID Diagnostic Card. The RFID Diagnostic Card is a nifty little tool you can use to easily detect what frequency and duty cycle any contactless reader is operating at. What it does not do is tell you where and how to place your xDF on the reader to get the best performance. That is where the xFD Field Tester comes in. Place the xFD up to a 13.56MHz reader and begin moving over the surface of the reader while trying different rotational orientations. Once the white LED inside lights up you will know that placing your xDF up to that reader in the same location and orientation will yield the best performance.
What can this chip implant do?
• Some types of access control applications
• Share data with NFC enabled smartphones
• Trigger events on NFC devices like smartphones
• Scan this chip implant to log into your computer
What this chip implant can’t do
• Can’t copy other chip IDs to this chip, ID is set
• Can’t make payments with this chip implant
• Chip implants can’t be used for GPS or tracking
Important Things To Know
Please expand the sections below to read up on things like performance expectations, return policy, installation procedure, etc.
- 13.56MHz ISO14443A & NFC Type 4 DESFire EV1 RFID chipset
- Datasheet for the NXP DESFire EV1 RFID/NFC chip
- 7 byte UID and 2K bytes of user read/write memory
- 25 year data retention. Rated for 500k writes per memory block.
- Encased in 3mm by 13mm bioglass with non-toxic epoxy
- Pre-tested and pre-loaded into sterile injection assembly
- No “anti-migration” coating means easy removal/replacement
DESFire EV1 chip specifications include
- Common Criteria Certification: EAL4+ (Hardware and Software)
- Unique 7 bytes serial number for each device
- Optional “RANDOM” ID for enhance security and privacy
- Mutual three-pass authentication
- Mutual authentication according to ISO/IEC 7816-4
- 1 card master key and up to 14 keys per application
- Hardware DES using 56/112/168 bit keys featuring key version, data authenticity by 8 byte CMAC
- Hardware AES using 128-bit keys featuring key version, data authenticity by 8 byte CMAC
- Data encryption on RF-channel
- Authentication on application level
- Hardware exception sensors
- Self-securing file system
- Backward compatibility to MF3ICD40: 4 byte MAC, CRC 16
ISO/IEC 7816 features
- File structure (selection by File ID or DF name)
- APDU message structure
- APDU wrapper for MIFARE DESFire native commands
- INS code ‘A4’ for SELECT FILE
- INS code ‘B0’ for READ BINARY
- INS code ‘D6’ for UPDATE BINARY
- INS code ‘B2’ for READ RECORDS
- INS code ‘E2’ for APPEND RECORD
- INS code ’84’ for GET CHALLENGE
- INS code ’88’ for INTERNAL AUTHENTICATE
- INS code ’82’ for EXTERNAL AUTHENTICATE
Interesting DESFire Feature Comparison
Passive RFID and NFC chips are magnetically coupled devices that power themselves and communicate data over a shared magnetic field the reader generates. This means their effective read range and performance depends entirely on how well the antenna coils of both the tag and reader couple with each other. This typically means the shape, size, and orientation of both antennas must be complimentary.
Unfortunately, most reader devices, including mobile phones, typically have antennas designed with thin PCB traces made into blocky rectangular shapes that lay along a flat plane. These antenna designs are great for coupling with and reading large flat labels and access cards which also share this antenna shape, but they have a hard time coupling to the very small cylindrical antenna coil inside our x-series chips. Most mobile phones and reader devices have a “sweet spot” or two that must be located and used each time to get consistent results. Other devices, such as the Samsung Ezon electronic deadbolt lock, sometimes use wire wound coil antenna loops inside, which work much more reliably with small glass transponders like our x-series chips. You should not expect your USB reader or mobile device to achieve the same read range with our x-series chips that you normally get with a label tag or card style tag. Here are some example videos detailing typical read performance and how to find that “sweet spot”.
The xFD can help! The xFD is a diagnostic device that mimics the x-series antenna coil winding and shows you the best possible location and rotation/orientation for holding your x-series transponder up to any reader. That’s why we include it in our deluxe bundle!
Our x-series transponders are typically installed into the webbing between the metacarpal bones of the index finger and thumb, resting parallel to the index metacarpal. The reason they are installed in the hand has to do with the extremely short read range of x-series chips and the typical use case being some form of access control where the tag must be presented to a fixed reader of some kind. The suggested placement within the hand was chosen due to the lack of major nerve bundles or blood vessels running through that area.
Achieving a safe installation definitely requires a steady hand and experience performing aseptic procedures. Dangerous Things prefers our customers locate one of our professional body piercing or body modification partners to complete the installation of this product. If no partners are available in your area, you should be able to follow this guide to finding a professional in your area who is willing to assist you. For aftercare information and what to expect, please read our X-Series FAQ page.