High Quality Content by WIKIPEDIA articles! The Direct Anonymous Attestation (DAA) is a cryptographic protocol which enables the remote authentication of a trusted platform whilst preserving the user's privacy. The protocol has been adopted by the Trusted Computing Group (TCG) in the latest version of its Trusted Platform Module (TPM) specification as a result of privacy concerns (see also Loss of Internet anonymity).In principle the privacy issue could be resolved using any standard signature scheme (or public key encryption) and a single key pair. Manufacturers would embed the private key into every TPM produced and the public key would be published as a certificate. Signatures produced by the TPM must have originated from the private key, by the nature of the technology, and since all TPMs use the same private key they are indistinguishable ensuring the user's privacy. This rather naive solution relies upon the assumption that there exists a global secret.

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