What is card MIFARE UID?

What is card MIFARE UID?

Mifare Card Serial Number is the unique identifier defined in ISO 14443-3A. There are 3 types of UID defined in the standard – single (4 bytes), double (7 bytes) and triple (10 bytes). Only in first versions of the Mifare card, the UID was 4 bytes but now have migrated to 7 bytes.

How many bits is a MIFARE card?

Key Features of MIFARE DESFire EV1 Technology and triple-DES data encryption and unique 56-bit serial number.

How many bytes is a UID?

The first byte of 4-byte-UIDs must not contain any of the following values: ‘x8’ (with x != ‘0’), ‘xF’. If you find the first byte to match any of those values, you can assume the UID to consist of 7 bytes.

What is card UID?

Unique IDentifier (UID) A Unique IDentifier (UID) is a numeric or alphanumeric string that is associated with a single entity within a given system. UIDs make it possible to address that entity, so that it can be accessed and interacted with. Most contactless smart cards typically have 4-byte, 7-byte and 10-byte UID.

What is MIFARE card format?

The standard MIFARE card is factory programmed with a unique 32-bit serial number. This is a random number and does not contain a facility code. Most 26-bit proximity cards use a facility code within their configurations. A MIFARE card has memory for storing values (typically up to 1 kilobyte of data).


MIFARE 2GO A cloud-based platform that digitizes MIFARE product-based smart cards and makes them available on NFC-enabled smartphones and wearables. With this, new Smart City use cases such as mobile transit ticketing, mobile access and mobile micropayments are being enabled.

How many bits are there in UID?

Most Unix-like operating systems represent the UID as an unsigned integer. The size of UID values varies amongst different systems; some UNIX OS’s used 15-bit values, allowing values up to 32767, while others such as Linux (before version 2.4) supported 16-bit UIDs, making 65536 unique IDs possible.

What’s UID number?

About UIDAI UIDAI was created to issue Unique Identification numbers (UID), named as “Aadhaar”, to all residents of India. The UID had to be (a) robust enough to eliminate duplicate and fake identities, and (b) verifiable and authenticable in an easy, cost-effective way.

What is Mifare card?

What are MIFARE® cards? MIFARE is a contactless card technology that was introduced in 1994. It was primarily used for transport passes, but its technological capabilities quickly made it one of the most popular smart cards for storing data and providing access control.

How do I check my MIFARE card type?

Re: How to know mifare card type if card-number is known. If you have a mobile phone with nfc and the card in question, you can use the Tag Info NXP app, with which you can get information about the chip you have.

How do I encode a MIFARE card?


  1. Ensure the OMNIKEY 5×47 reader is plugged in and installed within Windows.
  2. Open Access It!
  3. Within the System menu, navigate to Workstations.
  4. Edit the Workstation that will be encoding MIFARE cards.
  5. Select the Encode/Enroll tab.
  6. Select New.
  7. Assign a friendly name for the MIFARE encoder.

Is MIFARE Classic NFC?

In either case, NfcA will also be enumerated on the tag, because all MIFARE Classic tags are also NfcA .

What is UID number?

How many bytes does a MIFARE card have?

In fact the old system says: UID has only 4 bytes for Mifare Classics, 7 bytes have MIFARE Ultralight and MIFARE Ultralight C. It seems that this has be changed and there exists 4 and 7 byte UID Mifare cards.

Why does the MIFARE card with 4-byte UID not need the second cascade?

The MIFARE card with 4-byte UID doesn’t need the second cascade of anti-collision, if the reader is designed with two cascades of anti-collision, it can cause error. 2, in card authentication stage, it needs 4-byte UID code, 6-byte card password, and 1-byte data to participate in.

Why is the MIFARE 1K card not compatible with my MIFARE reader?

As the MIFARE 1K chip code varies so much, sometimes, the MIFARE 1K cards from different factories is not compatible with all the MIFARE readers in the market, there are two reasons for this phenomenon:

How many bytes of the UID are required for the authentication?

There are 3 solutions presently, 1), 88h and the first 3 bytes of the UID, 2), the first 4 bytes of the UID, 3, the last 4 bytes of the UID, to participate in the authentication stage.