ISSN : 1796-203X
Volume : 3    Issue : 12    Date : December 2008

Direct Anonymous Attestation for Next Generation TPM
Xiaofeng Chen and Dengguo Feng
Page(s): 43-50
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Trusted computing platforms have been proposed as a promising approach to enhance the security
of general-purpose computing systems. Direct Anonymous Attestation(DAA) is a scheme that
allows a Trusted Platform Module (TPM) which is the core component of the trusted computing
platform to remotely convince a communication partner that it is indeed a Trusted Platform Module
while preserving the user’s privacy. The first DAA scheme developed by Brickell which is relatively
complex and time-consuming was adopted by the current TPM specification.As the ECC
cryptosystem is more efficient compared to the RSA cryptosystem, more and more cryptographic
device is based on the ECC cryptosystem, so it is anticipated that the TPM will be based on the ECC
in near future. In this paper, we propose a new direct anonymous attestation which is suitable for
the ECC-based TPM. This paper presents an efficient construction that implements all anonymous
authentication features specified in DAA. The proposed scheme has the best computational
performance of all the DAA schemes up to now. The new DAA scheme is provably secure in the
random oracle model under the q- SDH and the decisional Diffie-Hellman assumption.

Index Terms
Direct Anonymous Attestation; Trusted Computing Platform;Trusted Platform Module; ECC