Cryptology ePrint Archive: Report 2009/598

On the Design and Implementation of an Efficient DAA Scheme

L. Chen, D. Page and N.P. Smart

Abstract: Direct Anonymous Attestation (DAA) is an anonymous digital signature scheme that aims to provide both signer authentication and privacy. One of the properties that makes DAA an attractive choice in practice is the split signer role. In short, a principal signer (a Trusted Platform Module (TPM)) signs messages in collaboration with an assistant signer (the Host, a standard computing platform into which the TPM is embedded). This split aims to harness the high level of security o ffered by the TPM, and augment it using the high level of computational and storage ability o ered by the Host. Our contribution in this paper is a modi cation to an existing pairing-based DAA scheme that signi cantly improves efficiency, and a comparison with the original RSA-based DAA scheme via a concrete implementation.

Category / Keywords: implementation /

Date: received 4 Dec 2009

Contact author: nigel at cs bris ac uk

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Version: 20091209:215522 (All versions of this report)

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