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

Appendix 11

COMMON SECURITY MECHANISMS

PART BSECOND-GENERATION TACHOGRAPH SYSTEM

12.VU — MOTION SENSOR PAIRING AND COMMUNICATION

12.3.VU — Motion Sensor Pairing and Communication using AES

CSM_220In case the plaintext data length (using AES keys) is not a multiple of 16 bytes, padding method 2 defined in [ISO 9797-1] shall be used.

Note: in [ISO 16844-3], the number of plaintext data bytes is always a multiple of 8, such that padding is not necessary when using TDES. The definition of data and messages in [ISO 16844-3] is not changed by this part of this Appendix, thus necessitating the application of padding.