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Certificateless cryptography eliminates the key escrow problem in identity-based cryptography. Hierarchical cryptography exploits a practical security model to mirror the organizational hierarchy in the real world. In this paper, to incorporate the advantages of both types of cryptosystems, we instantiate hierarchical certificate less cryptography by formalizing the notion of hierarchical certificate...
Vehicular ad hoc networks (VANETs) are designed to improve traffic safety and efficiency. To this end, the traffic communication must be authenticated to guarantee trustworthiness for guiding drivers and establishing liability in case of traffic accident investigation. Cryptographic authentication techniques have been extensively exploited to secure VANETs. Applying cryptographic authentication techniques...
In this paper, we propose a practical ID-based (partially)blind signature scheme. Our scheme combines the already existing notions of blind signatures and identity-based cryptography.The signatures are shown secure in the random oracle model. We show how to use our ID-based PBSs to construct an electronic cash (e-cash) system in which multiple banks can securely distribute untraceable e-cash.
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