ECQV-IBI: Identity-based identification with implicit certification

doi:10.1016/j.jisa.2021.103027

ECQV-IBI: Identity-based identification with implicit certification

2021-12-01

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DOI：10.1016/j.jisa.2021.103027

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Identity-based identification (IBI) schemes allow a prover to provide entity identification, based on its unique identity. This paper provides the first non-trivial IBI scheme with implicit certification by using the Elliptic Curve Qu Vanstone (ECQV) implicit certification scheme. In contrast to the conventional identity-based schemes, the implicit certificate based approach is resistant against key escrow since the trusted authority only a part of the secret key, which is used as input by the user to construct its own user secret key. We show our scheme is able to achieve Trust Level 3 according to Girault's definitions, while requiring less resources when compared to certificateless identification. A corresponding formal security model is defined, showing the resistance of our proposed scheme against impersonation attacks. Compared to other Schnorrbased IBI schemes, our proposed IBI scheme with implicit certification outperforms in storage, computation and communication efficiency and thus offers a viable solution to be applied in an internet of things (IoT) context.

Keywords:

Identity-based identification

Key escrow

Implicit certification

ECQV

ECQV-IBI: Identity-based identification with implicit certification

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