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Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport
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[CSM_006] RSA keys shall be generated through three functional hierarchical levels:
European level,
Member State level,
Equipment level.
[CSM_007] At European level, a single European key pair (EUR.SK and EUR.PK) shall be generated. The European private key shall be used to certify the Member States public keys. Records of all certified keys shall be kept. These tasks shall be handled by a European certification authority, under the authority and responsibility of the European Commission.
[CSM_008] At Member State level, a Member State key pair (MS.SK and MS.PK) shall be generated. Member States public keys shall be certified by the European Certification Authority. The Member State private key shall be used to certify public keys to be inserted in equipment (vehicle unit or tachograph card). Records of all certified public keys shall be kept with the identification of the equipment to which it is intended. These tasks shall be handled by a Member State certification authority. A Member State may regularly change its key pair.
[CSM_009] At equipment level, one single key pair (EQT.SK and EQT.PK) shall be generated and inserted in each equipment. Equipment public keys shall be certified by a Member State certification authority. These tasks may be handled by equipment manufacturers, equipment personalisers or Member State authorities. This key pair is used for authentication, digital signature and encipherement services
[CSM_010] Private keys confidentiality shall be maintained during generation, transport (if any) and storage.
The following picture summarises the data flow of this process:
[CSM_011] For the purpose of equipment testing (including interoperability tests) the European certification authority shall generate a different single European test key pair and at least two Member State test key pairs, the public keys of which shall be certified with the European private test key. Manufacturers shall insert, in equipment undergoing type approval tests, test keys certified by one of these Member State test keys.
The confidentiality of the three TDES keys described below shall be appropriately maintained during generation, transport (if any) and storage.
In order to support recording equipment compliant with ISO 16844, the European certification authority and the Member State certification authorities shall, in addition, ensure the following:
[CSM_036] The European certification authority shall generate Km VU and Km WC , two independent and unique Triple DES keys, and generate Km as:
The European certification authority shall forward these keys, under appropriately secured procedures, to Member States certification authorities at their request.
[CSM_037] Member States certification authorities shall:
use Km to encrypt motion sensor data requested by motion sensor manufacturers (data to be encrypted with Km is defined in ISO 16844-3),
forward Km VU to vehicle unit manufacturers, under appropriately secured procedures, for insertion in vehicle units,
ensure that Km WC will be inserted in all workshop cards ( SensorInstallationSecData in Sensor_Installation_Data elementary file) during card personalisation.
[CSM_012] Vehicle units and tachograph cards shall, as a part of the mutual authentication process, generate and exchange necessary data to elaborate a common Triple DES session key. This exchange of data shall be protected for confidentiality through an RSA crypt-mechanism.
[CSM_013] This key shall be used for all subsequent cryptographic operations using secure messaging. Its validity shall expire at the end of the session (withdrawal of the card or reset of the card) and/or after 240 use (one use of the key = one command using secure messaging sent to the card and associated response).] ]
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