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

Appendix 11

COMMON SECURITY MECHANISMS

PART BSECOND-GENERATION TACHOGRAPH SYSTEM

9.KEYS AND CERTIFICATES

9.2.Symmetric Keys

9.2.2Keys for Securing DSRC Communication

9.2.2.1General

CSM_120

The DSRC master key KMDSRC shall be an AES key that is securely generated, stored and distributed by the ERCA. The key length may be 128, 192 or 256 bits and shall be linked to the length of the European root key pair, as described in CSM_50.