ANNEX I CRequirements for construction, testing, installation, and inspection
Appendix 11
COMMON SECURITY MECHANISMS
PART AFIRST-GENERATION TACHOGRAPH SYSTEM
5.VU-CARDS DATA TRANSFER CONFIDENTIALITY, INTEGRITY AND AUTHENTICATION MECHANISMS
5.4.Algorithm to compute cryptograms for confidentiality DOs
CSM_031Cryptograms are computed using TDEA in TCBC mode of operation in accordance with references [TDES] and [TDES-OP] and with the Null vector as Initial Value block.
The following figure shows the application of keys in TDES:
