User's Manual

Table Of Contents
ACGPass e-ID Desktop Reader, Ver. Dual ISO 2.3
8.4.3.4 DES encryption / decryption of data
This command returns 8 bytes of encrypted / decrypted data.
Command
Command Data
'ds' Options (1 byte)
Key (8/16 bytes) / Key Number (1 byte)
Data (8 byte)
Answer
Answer Description
Data Encrypted / Decrypted data (8 bytes)
Option byte
Option byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RFU RFU RFU RFU RFU Encode
Key
Length
Key
Index
Key Index
If set, the command only needs the key number (1 byte) instead of the key (8/16
bytes).
The key number corresponds to the key number used in the "wf" command
Key Length
If set, the command uses the TDES algorithm with 16-byte key.
If cleared, the command uses the DES algorithm with 8-byte key.
Encode
Setting this flag encodes the data.
Clearing this flag decodes the data.
ASSA ABLOY Identification Technologies GmbH 55