We introduce a new privacy-friendly cryptographic primitive we call Direct Anonymous Attestations with Dependent Basename Opening (DAA-DBO). Such a primitive is a Direct Anonymous Attestation in which the anonymity can be revoked only if a specific authority, called the admitter, allowed to revoke the DAA signatures that include a specific basename. We also present an efficient scheme that achieves this functionality, secure in the random oracle model. Furthermore, we provide a prototype implementation of an anonymous transit pass system, based on this new primitive. Compared to previous privacy-friendly cryptographic primitives with partial linkability, we provide a way to share the power to open signatures between two entities which is more practical than the use of conventional techniques from threshold cryptography.
CITATION STYLE
Desmoulins, N., Lescuyer, R., Sanders, O., & Traore, J. (2014). Direct anonymous attestations with dependent basename opening. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 8813, pp. 206–221). Springer Verlag. https://doi.org/10.1007/978-3-319-12280-9_14
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