Efficient Identity-based Broadcast Encryption without Random Oracles
نویسندگان
چکیده
منابع مشابه
Efficient Identity-based Broadcast Encryption without Random Oracles
We propose a new efficient identity-based broadcast encryption scheme without random oracles and prove that it achieves selective identity, chosen plaintext security. Our scheme is constructed based on bilinear Diffie-Hellman inversion assumption and it is a good efficient hybrid encryption scheme, which achieves O(1)-size ciphertexts, public parameters and constant size private keys. In our sc...
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We present the first efficient Identity-Based Encryption (IBE) scheme that is fully secure without random oracles. We first present our IBE construction and reduce the security of our scheme to the decisional Bilinear Diffie-Hellman (BDH) problem. Additionally, we show that our techniques can be used to build a new signature scheme that is secure under the computational Diffie-Hellman assumptio...
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In a broadcast encryption (BE) scheme, a broadcaster can encrypt a message for a set S of users who are listening to a broadcast channel. Most identity-based broadcast encryption (IBBE) schemes are not anonymous, which means the attacker can obtain the identities of all receivers from the ciphertext. Currently, anonymous IBBE schemes are only provably secure in the random oracle model. In this ...
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We present a fully secure Identity Based Encryption scheme whose proof of security does not rely on the random oracle heuristic. Security is based on the Decision Bilinear Diffie-Hellman assumption. This solves an open problem posed by Boneh and Franklin in 2001.
متن کاملEfficient Selective-ID Secure Identity-Based Encryption Without Random Oracles
We construct two efficient Identity Based Encryption (IBE) systems that are selective identity secure without the random oracle model in groups equipped with a bilinear map. Selective identity secure IBE is a slightly weaker security model than the standard security model for IBE. In this model the adversary must commit ahead of time to the identity that it intends to attack, whereas in the sta...
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ژورنال
عنوان ژورنال: Journal of Computers
سال: 2010
ISSN: 1796-203X
DOI: 10.4304/jcp.5.3.331-336