An Efficient Direct Anonymous Attestation Scheme with Forward Security
Source: Chinese Academy of Sciences
Direct Anonymous Attestation (DAA) is a cryptographic mechanism adopted by the trusted computing group in its specifications for Trusted Computing Platforms (TCP). In this paper, the authors propose a new DAA scheme and prove it is secure under the strong RSA assumption and the decisional Diffie-Hellman assumption. While satisfying all the security properties proposed in previous DAA schemes, their scheme provides a new desired security property, forward security: compromise of the current private key of TPM does not enable an adversary to forge signatures pertaining to the past. Such forward security is important to mitigate the damage caused by private key exposure.