DAA (Data Access Arrangement) authentication method and system based on elliptical curve divergence logarithm intractability assumption

Abstract

The invention discloses a DAA (Data Access Arrangement) authentication method and a system based on an intractability assumption of an ordinary elliptical curve divergence logarithm, which are used for solving the problems of high complexity and large operand of a direct anonymous authentication protocol caused by different intractability assumptions in the prior art. In the scheme, point addition and scalar multiplication of an elliptical curve are adopted, so that the complexity is lowered greatly, key lengths and signature lengths are short, the total performance is improved greatly, and the operand of each participating entity such as a TPM (Trusted Platform Module), a Host, an Issuer, a Verifier and the like in a Join protocol, a Sign protocol and a Verify algorithm is reduced.

Description

technical field [0001] The present invention relates to the technical field of digital authentication, in particular to a direct anonymous authentication (Direct Anonymous Attestation, DAA) authentication method and system based on the difficult assumption of ordinary elliptic curve discrete logarithms. Background technique [0002] For platform identity authentication, the Trusted Computing Group (Trusted Computing Group, TCG) has adopted a direct anonymous authentication protocol, which is one of the best theoretical solutions for current trusted computing platform identity authentication. [0003] Many research groups are studying the DAA scheme based on elliptic curve and bilinear mapping, referred to as ECC-DAA. According to the difficult hypothesis, ECC-DAA is divided into two different types. One is ECC-DAA based on LRSW assumption and two-wire pair DDH assumption. In order to increase the flexibility, safety and efficiency of the implementation, this is extended by...

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Problems solved by technology

[0006] In view of this, the implementation of the present invention provides a DAA authentication method and system based on the difficult assumption of ordinary elliptic curve discrete logarithms, to solve the problem of high computational complexity caused by difficult assumptions in the prior art, leading to direct anonymous authentication The authentication method of the protocol has high complexity and a large amount of computation

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