Topic
Plaintext-aware encryption
About: Plaintext-aware encryption is a research topic. Over the lifetime, 1980 publications have been published within this topic receiving 101775 citations. The topic is also known as: Plaintext awareness.
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Papers
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TL;DR: A novel image encryption scheme based on the improved hyperchaotic sequences that can achieve high key sensitivity and high plaintext sensitivity through only two rounds diffusion operation is proposed.
369 citations
01 Mar 1999
TL;DR: In this paper, the authors presented a simple and efficient conversion from a semantically secure public-key encryption scheme against passive adversaries to a non-malleable (or semi-secure) public key encryption scheme with adaptive chosen-ciphertext attacks (active adversaries) in the random oracle model.
Abstract: This paper presents a simple and efficient conversion from a semantically secure public-key encryption scheme against passive adversaries to a non-malleable (or semantically secure) public-key encryption scheme against adaptive chosen-ciphertext attacks (active adversaries) in the random oracle model. Since our conversion requires only one random (hash) function operation, the converted scheme is almost as efficient as the original one, when the random function is replaced by a practical hash function such as SHA-1 and MD5. We also give a concrete analysis of the reduction for proving its security, and show that our security reduction is (almost) optimally efficient. Finally this paper gives some practical examples of applying this conversion to some practical and semantically secure encryption schemes such as the ElGamal, Blum-Goldwasser and Okamoto-Uchiyama schemes[4, 7, 9].
346 citations
14 Feb 2005
TL;DR: Canetti, Halevi, and Katz as discussed by the authors improved the efficiency of their construction, and showed two specific instantiations of their resulting scheme which offer the most efficient encryption and, in one case, key generation of any CCA-secure encryption scheme to date.
Abstract: Recently, Canetti, Halevi, and Katz showed a general method for constructing CCA-secure encryption schemes from identity-based encryption schemes in the standard model. We improve the efficiency of their construction, and show two specific instantiations of our resulting scheme which offer the most efficient encryption (and, in one case, key generation) of any CCA-secure encryption scheme to date.
334 citations
Journal Article•
TL;DR: A Hierarchical Identity Based Encryption system where the ciphertext consists of just three group elements and decryption requires only two bilinear map computations, regardless of the hierarchy depth, which is proved to be as efficient as in other HIBE systems.
Abstract: We present a Hierarchical Identity Based Encryption (HIBE) system where the ciphertext consists of just three group elements and decryption requires only two bilinear map computations, regardless of the hierarchy depth. Encryption is as efficient as in other HIBE systems. We prove that the scheme is selective-ID secure in the standard model and fully secure in the random oracle model. Our system has a number of applications: it gives very efficient forward secure public key and identity based cryptosystems (with short ciphertexts), it converts the NNL broadcast encryption system into an efficient public key broadcast system, and it provides an efficient mechanism for encrypting to the future. The system also supports limited delegation where users can be given restricted private keys that only allow delegation to bounded depth. The HIBE system can be modified to support sublinear size private keys at the cost of some ciphertext expansion.
332 citations
TL;DR: A novel image encryption scheme, which is based on the chaotic tent map, is proposed, which has a better performance in terms of randomness properties and security level and is efficient and secure.
Abstract: Image encryption has been an attractive research field in recent years. The chaos-based cryptographic algorithms have suggested some new and efficient ways to develop secure image encryption techniques. This paper proposes a novel image encryption scheme, which is based on the chaotic tent map. Image encryption systems based on such map show some better performances. Firstly, the chaotic tent map is modified to generate chaotic key stream that is more suitable for image encryption. Secondly, the chaos-based key stream is generated by a 1-D chaotic tent map, which has a better performance in terms of randomness properties and security level. The performance and security analysis of the proposed image encryption scheme is performed using well-known ways. The results of the fail-safe analysis are inspiring, and it can be concluded that the proposed scheme is efficient and secure.
329 citations