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Vehicular networks rely on public key infrastructure (PKI) to generate long-term and short-term pseudonyms that protect vehicle's privacy. Instead of relying on a complex and centralized ecosystem of PKI entities, a more scalable solution is to rely on Direct Anonymous Attestation (DAA) and the use of Trusted Computing elements. In particular, revocation based on DAA is very attractive in terms of efficiency and privacy: it does not require the use of CRLs and revocation authority can exclude misbehaving participants from a V2X system without resolving (i.e. learning) their long-term identity. In this paper we design a novel revocation protocol based on DAA and show a detailed design and modeling of the implementation on a real TPM platform in order to demonstrate its significant performance improvements compared to existing solutions.