Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance) (c. 799)

ANNEX I C U.K. Requirements for construction, testing, installation, and inspection

Appendix 11

COMMON SECURITY MECHANISMS U.K.

PART A U.K. FIRST-GENERATION TACHOGRAPH SYSTEM

3. KEYS AND CERTIFICATES U.K.

3.3. Certificates U.K.

3.3.2 Certificates issued U.K.

CSM_018 The certificate issued is a digital signature with partial recovery of the certificate content in accordance with ISO/IEC 9796-2 (except for its annex A4), with the ‘Certification Authority Reference’ appended. U.K.

X.C = X.CA.SK[‘6A’ || C_r || Hash(Cc) || ‘BC’] || C_n || X.CAR

With certificate content = Cc =	Cr	||	Cn
	106 bytes		58 bytes

Notes: U.K.

1. This certificate is 194 bytes long. U.K.

2. CAR, being hidden by the signature, is also appended to the signature, such that the Public Key of the Certification Authority may be selected for the verification of the certificate. U.K.

3. The certificate verifier shall implicitly know the algorithm used by the Certification Authority to sign the certificate. U.K.

4. The headerlist associated with this issued certificate is as follows: U.K.

‘7F 21’	‘09’	‘5F 37’	‘81 80’	‘5F 38’	‘3A’	‘42’	‘08’
CV Certificate Tag (Constructed)	Length of subsequent DOs	Signature Tag	Signature Length	Remainder Tag	Remainder Length	CAR Tag	CAR Length