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ACG HF Multi ISO RFID Reader - RFID Webshop

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<strong>ACG</strong> <strong>HF</strong> <strong>Multi</strong> <strong>ISO</strong> <strong>RFID</strong> <strong>Reader</strong> V1.0<br />

12.4.3.4 DES encryption / decryption of data<br />

This command returns 8 bytes of encrypted / decrypted data.<br />

Command<br />

Command<br />

'ds'<br />

Data<br />

Options (1 byte)<br />

Key (8/16 bytes) / Key Number (1 byte)<br />

Data (8 byte)<br />

Answer<br />

Answer<br />

Data<br />

Description<br />

Encrypted / Decrypted data (8 bytes)<br />

Option byte<br />

Option byte<br />

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0<br />

RFU RFU RFU RFU RFU Encode<br />

Key<br />

Length<br />

Key<br />

Index<br />

Key Index<br />

If the Key Index is set, the command only needs the key number (1 byte) instead of<br />

the key (8/16 bytes).<br />

The key number corresponds to the key number used in the key management.<br />

Key Length<br />

If the Key Length is set, the command uses the TDES algorithm with 16-byte key.<br />

If cleared, the command uses the DES algorithm with 8-byte key.<br />

If key index is used the key length flag is valid.<br />

Encode<br />

Setting this flag encodes the data.<br />

Clearing this flag decodes the data.<br />

<strong>ACG</strong> Identification Technologies GmbH 63

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