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This paper introduces hardware and software components for secure automotive on-board networks providing the basis for the protection of external vehicle communication. It is based on work done within the European research project EVITA (http://evitaproject. org). It provides a framework that covers cross-layer security, targeting platform integrity, communication channels, access control and intrusion detection and management. The paper presents a modular hardware/software co-design: Hardware Security Modules (HSM) provide means to protect the platform integrity, to ensure the integrity and confidentiality of key material and to enhance cryptographic operations, thereby protecting critical assets of the architecture.
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