mf1s503x NXP Semiconductors, mf1s503x Datasheet - Page 7

• Manufacturer Part Number: mf1s503x
• Description: Mf1s503x Mifare Classic 1k - Mainstream Contactless Smart Card Ic For Fast And Easy Solution Development
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MF1S503x
Product data sheet
PUBLIC
8.2.5 Memory operations
8.3 Data integrity
8.4 Three pass authentication sequence
After authentication any of the following operations may be performed:
Following mechanisms are implemented in the contactless communication link between
reader and card to ensure very reliable data transmission:
After transmission of the first random challenge the communication between card and
reader is encrypted.
1. The reader specifies the sector to be accessed and chooses key A or B.
2. The card reads the secret key and the access conditions from the sector trailer. Then
3. The reader calculates the response using the secret key and additional input. The
4. The card verifies the response of the reader by comparing it with its own challenge
5. The reader verifies the response of the card by comparing it to its own challenge.
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Read block
Write block
Decrement: Decrements the contents of a block and stores the result in an internal
data-register
Increment: Increments the contents of a block and stores the result in an internal
data-register
Restore: Moves the contents of a block into an internal data-register
Transfer: Writes the contents of the temporary internal data-register to a value block
16 bits CRC per block
Parity bits for each byte
Bit count checking
Bit coding to distinguish between “1”, “0” and “no information”
Channel monitoring (protocol sequence and bit stream analysis)
the card sends a random number as the challenge to the reader (pass one).
response, together with a random challenge from the reader, is then transmitted to the
card (pass two).
and then it calculates the response to the challenge and transmits it (pass three).
All information provided in this document is subject to legal disclaimers.
Rev. 3.1 — 21 February 2011
MIFARE Classic 1K - Mainstream contactless smart card IC
194031
MF1S503x
© NXP B.V. 2011. All rights reserved.
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