2.2.1.7 Authenticated Commands

This protocol supports sending cryptographically signed commands from the receiver to the transmitter.

Sending Cryptographically Signed Commands from the Receiver to the Transmitter

Figure 3: Sending Cryptographically Signed Commands from the Receiver to the Transmitter

The following table describes elements of the previous diagram.

Value

Description

Session ID

128 bit session identifier generated in registration.

Counter

Current value of the counter for sending authenticated messages. This value starts at zero (0).

Command Data

The data structure holding the data for the command. See below for details.

OMAC

OMAC1 [OMAC] of the message using the authenticated command key.

Result

Error code for the operation.

0 means success

0x071 (113) means Bad request

0x072 (114) means Counter Mismatch

0x073 (115) means Invalid Signature