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Hitag3:

Covered transponder family: PCF7938X and it’s MCU based derivatives.

Security is based on 96-bit secret key, principles are very similar to basic Hitag2 (PCF7936) transponder operation except cryptography. EEPROM size: 512 bytes.

XMA (extended memory access) is based on possibility to split entire memory in 8 pages with different access rights.

It is possible to access Hitag block only in cipher mode. Or via XMA.

Blank chip must be configured first to grant XMA access.