AT88RF04C-MY1G View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88RF04C-MY1G

CryptoRF® Specification

Atmel Corporation 

Appendix J. Using Authentication Communication Security

CryptoRF contains security options that can be enabled by the customer at personalization. By default no security is

enabled, allowing CryptoRF to operate as a simple RFID EEPROM memory. Enabling Authentication Communication

Security on a User Zone restricts access to the data to users with knowledge of the Authentication key.

J.1.

Communication Security

Communication between the PICC and reader operates in three security modes. The Normal mode allows

communication of all types of data in the clear. Authentication Communication Security mode encrypts only passwords.

Encryption Communication Security mode encrypts both user data and passwords. The default communication mode is

Normal mode.

Table 81. CryptoRF Communication Security Options.

Communication Mode

User Data

Normal

Clear

Authentication

Clear

Encryption

Encryption

System Data

Clear

Clear

Clear(1)

Passwords

Clear

Encryption

Encryption

Note: 1. 88RF PICCs support an encryption option for programming secrets. See Appendix F.

Authentication Communication Security is activated by performing Mutual Authentication between the Host system and

the PICC using the Verify Crypto command. Once activated, the PICC will remain in Authentication mode until a

security error occurs, a new Verify Crypto command is received, RF power is removed, or a DESELECT command or

IDLE command is received.

J.2.

Authentication Security Options [88SC]

Authentication Communication Security for a User Zone is enabled by programming the Access Register (AR) and

Password Register (PR) for the zone. The Communication Security Mode (M) bits [AM1, AM0, ER] of the Access

Register determine the Communication Security requirements for the User Zone. The Password Register determines

which Key Set(s) are used to access the User Zone. Configuration of the AR and PR registers is described in

Appendix H.

Table 82. Selecting Authentication using the Communication Security Mode bits of the Access Register.

AM1 AM0 ER

Communication Security Mode

Auth. Key (AK) Pgm-Only Key (POK)

0

0

1 Dual Access Authentication Mode

Read / Write Access

Read / Program Access

0

1

1 Authentication for Read / Write

Read / Write Access

N/A

1

0

1 Authentication for Write

Read / Write Access

N/A

1

1

1 No Authentication or Encryption Required

N/A

N/A

Table 82 shows the three 88SC PICC Authentication Communication Security options, plus the default setting. By

default M = 111b and no Authentication or Encryption Activation is required to access the user memory.

106 AT88SC0808/1616/3216/6416CRF, AT88RF04C

5276C–RFID–3/09

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