Eccel Technology Ltd BIORADRDR0200 Manuel D’Utilisation

4.2.8 Encrypt Data (0x08)

Table 4.8

The Encrypt Data command takes as command arguments the Encryption Key Number (0x00 or 0x01), the
Initialization Vector Number (0x00 or 0x01), the Data Buffer Offset (16-bytes blocks) and the Data Length (16-bytes
blocks). This command encrypts the ‘Data Length’ number of 16-byte blocks using the AES128 CBC encryption
methodology. It operates only within the Data Buffer. This encryption method is shown in Figure 4.1.

Figure 4.1

Command Number

Command Name

Valid Tag Types

Argument Offset [bytes]

0x00

0x01

0x02

0x03

Argument Name

Encryption Key

Number

Initialization Vector

Number

Data Buffer Offset

Data Length

Argument Size [bytes]

0x01

Argument Description

Number of the AES

encryption key to be

used for encryption.

Valid numbers are

0x00 and 0x01.

Number of the

Initialization Vector to

be used for encryption.

Valid numbers are

0x00 and 0x01.

Buffer offset in 16-byte

blocks from where

encryption will start.

Total data size and the

offset cannot exceed

the data buffer length.

Number of 16 byte
bocks of data to be

encrypted. This value

can be between 1 and

0x08

Encrypt Data