ANNEX I CRequirements for construction, testing, installation, and inspection

Appendix 11

COMMON SECURITY MECHANISMS

PART BSECOND-GENERATION TACHOGRAPH SYSTEM

13.SECURITY FOR REMOTE COMMUNICATION OVER DSRC

13.1.General

CSM_224The DSRC security data shall consist of the concatenation of the following data elements in the following order; see also Figure 12:

Current date time

the current date and time of the VU (data type Image_r00655)

Counter

a 3-byte counter, see CSM_225

F1VU serial number

the VU’s serial number or certificate request ID (data type VuSerialNumber or CertificateRequestID) – see CSM_123

DSRC master key version number

the 1-byte version number of the DSRC master key from which the VU-specific DSRC keys were derived, see section 9.2.2.

MAC

the MAC calculated over all previous bytes in the RTM data.