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CCA Secure IB-KEM from the Computational Bilinear Diffie-Hellman Assumption in the Standard Model.

Yu Chen, Liqun Chen, Zongyang Zhang

Published Jan 1, 2011• 1 citation
OpenAlex

Abstract

Abstract. In this paper, we propose several selective-identity chosen-ciphertext attack secure identity based key encapsulation (IB-KEM) schemes that are provably secure under the computational bilinear Diffie-Hellman (CBDH) assumption in the standard model. Our schemes compare favorably to previous results in efficiency. With delicate modification, our schemes can be strengthened to be full-identity CCA secure easily.

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Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM.

Liming Fang, Jiandong Wang, Yongjun Ren +2 more

Abstract. We use hybrid encryption with Fuzzy Identity-Based Encryption (Fuzzy-IBE) schemes, and present the first and efficient fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) schemes which are chosen-ciphertext secure (CCA) without random oracle in the selective-ID model. To achieve these goals, we consider Fuzzy-IBE schemes as consisting of separate key and data encapsulation mechanisms (KEM-DEM), and then give the definition of Fuzzy-IB-KEM. Our main idea is to enhance Sahai and Waters ' "large universe " construction, chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.

•Jan 1, 2008•5 citations

CCA Secure IB-KEM from the Computational Bilinear Diffie-Hellman Assumption in the Standard Model

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Lecture notes in computer science•Jan 1, 2012•6 citations

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In this paper, by means of correlated products, we present a lattice-based identity-based key encapsulation mechanism (IB-KEM) that is secure against an adaptive chosen-identity and chosen-cipher text attack (IND-ID-CCA) in the standard model and that is not explicitly derived from hierarchical identity-based techniques. We give a rigorous, games-based proof of our result.

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In this paper, we present a novel multi-receiver identity-based key encapsulation mechanism (mID-KEM) scheme which is provably secure against chosen ciphertext attacks in the standard model and has several advantages over previous constructions without random oracles, including short public parameters, short private keys, computational efficiency in decapsulation algorithm and tight security reduction. To our best knowledge, our construction is the first in the literature to achieve such a high security level (CCA-security in the full security model).

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Identity-Based Threshold Decryption Schemes Secure against Chosen Ciphertext Attacks in the Standard Model

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We propose two efficient Identity-Based threshold decryption schemes.They are proved secure against chosen ciphertext attacks under the standard decisional bilinear Diffie-Hellman assumption.The first one is constructed from(one of) the Selective ID-Based Encryption(Selective-IBE) scheme proposed by Boneh and Boyen recently,yet the second one is transformed from the Full ID-Based Encryption(Full-IBE) scheme obtained by Waters.As the based IBE schemes,the attacker in the first proposal has to choose the challenge identity before the common parameter is generated.while the attacker in the second one could choose the identity adaptively.To the best of our knowledge,previous related schemes could only be proved secure in the random oracle model.

Journal of the Graduate School of the Chinese Academy of Sciences•Jan 1, 2006•1 citation

Chosen-Ciphertext Secure Multi-Authority Fuzzy Identity-Based Key Encapsulation without ROM

Liming Fang, Jiandong Wang, Yongjun Ren +2 more

We present the first and efficient multi-authority fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) scheme which is chosen ciphertext secure (CCA) without random oracle in the selective-ID model. Our main idea is to enhance Chase's "large universe" construction, chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.

International Conference on Computational Intelligence and Security (CIS)•Dec 1, 2008•5 citations
Abstract. In this paper, we propose several selective-identity chosen-ciphertext attack secure identity based key encapsulation (IB-KEM) schemes that are provably secure under the computational bilinear Diffie-Hellman (CBDH) assumption in the standard model. Our schemes compare favorably to previous results in efficiency. With delicate modification, our schemes can be strengthened to be full-identity CCA secure easily.
Abstract. We use hybrid encryption with Fuzzy Identity-Based Encryption (Fuzzy-IBE) schemes, and present the first and efficient fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) schemes which are chosen-ciphertext secure (CCA) without random oracle in the selective-ID model. To achieve these goals, we consider Fuzzy-IBE schemes as consisting of separate key and data encapsulation mechanisms (KEM-DEM), and then give the definition of Fuzzy-IB-KEM. Our main idea is to enhance Sahai and Waters ' "large universe " construction, chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.
In this paper, we present a novel multi-receiver identity-based key encapsulation mechanism (mID-KEM) scheme which is provably secure against chosen ciphertext attacks in the standard model and has several advantages over previous constructions without random oracles, including short public parameters, short private keys, computational efficiency in decapsulation algorithm and tight security reduction. To our best knowledge, our construction is the first in the literature to achieve such a high security level (CCA-security in the full security model).
We propose two efficient Identity-Based threshold decryption schemes.They are proved secure against chosen ciphertext attacks under the standard decisional bilinear Diffie-Hellman assumption.The first one is constructed from(one of) the Selective ID-Based Encryption(Selective-IBE) scheme proposed by Boneh and Boyen recently,yet the second one is transformed from the Full ID-Based Encryption(Full-IBE) scheme obtained by Waters.As the based IBE schemes,the attacker in the first proposal has to choose the challenge identity before the common parameter is generated.while the attacker in the second one could choose the identity adaptively.To the best of our knowledge,previous related schemes could only be proved secure in the random oracle model.