Results 231 to 240 of about 10,953 (251)

Proxy Re-encryption with Unforgeable Re-encryption Keys

2014
Proxy re-encryption PRE provides nice solutions to the delegation of decryption rights. In proxy re-encryption, the delegator Alice generates re-encryption keys for a semi-trusted proxy, with which the proxy can translate a ciphertext intended for Alice into a ciphertext for the delegatee Bob of the same plaintext.
Hui Guo, Zhenfeng Zhang, Jiang Zhang
openaire   +1 more source

Generally Hybrid Proxy Re-Encryption

Proceedings of the 11th ACM on Asia Conference on Computer and Communications Security, 2016
Proxy Re-Encryption (PRE) is a favorable primitive to realize a cryptographic cloud with secure and flexible data sharing mechanism. A number of PRE schemes with versatile capabilities have been proposed for different applications. The secure data sharing can be internally achieved in each PRE scheme.
Peng Xu, Jun Xu, Wei Wang, Hai Jin, Willy Susilo, Deqing Zou   +5 more
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Combined Proxy Re-encryption

2014
Among the variants of public key encryption schemes, the proxy re-encryption primitive (PRE) allows a user, say Alice, to decide that a delegate, say Bob, will be able to read her private messages. This is made possible thanks to a third party, the proxy, which is given a re-encryption key to transform a ciphertext intended to Alice into one intended ...
Sébastien Canard, Julien Devigne
openaire   +1 more source

Unforgeability of Re-Encryption Keys against Collusion Attack in Proxy Re-Encryption

2011
Proxy re-encryption (PRE) allows a proxy to convert a ciphertext encrypted for Alice (delegator) into a ciphertext for Bob (delegatee) by using a re-encryption key generated by Alice. In PRE, non-transferability is a desirable property that colluding proxies and delegatees cannot re-delegate decryption rights to a malicious user.
Ryotaro Hayashi, Tatsuyuki Matsushita, Takuya Yoshida, Yoshihiro Fujii, Koji Okada   +4 more
openaire   +1 more source

Fuzzy conditional proxy re-encryption

Science China Information Sciences, 2012
Weng et al. introduced the notion of conditional proxy re-encryption (C-PRE), whereby only the ciphertext satisfying one condition set by Alice can be re-encrypted by the proxy. To achieve more fine-grained delegation on the condition set, we introduce a new cryptographic primitive called fuzzy conditional proxy re-encryption (FC-PRE) in which we view ...
LiMing Fang, JianDong Wang, ChunPeng Ge, YongJun Ren   +3 more
openaire   +1 more source

Adaptively Secure Proxy Re-encryption

2019
A proxy re-encryption (PRE) scheme is a public-key encryption scheme that allows the holder of a key pk to derive a re-encryption key for any other key pk′. This re-encryption key lets anyone transform ciphertexts under pk into ciphertexts under pk′ without having to know the underlying message, while transformations from pk′to pk should not be ...
Fuchsbauer, Georg, Kamath, Chethan, Klein, Karen, Pietrzak, Krzysztof   +3 more
openaire   +2 more sources

K-times Proxy Re-encryption

2011 Seventh International Conference on Computational Intelligence and Security, 2011
The traditional proxy re-encryption (PRE) or conditional proxy re-encryption (CPRE) can re-encrypt infinite times on the delegator's cipher text. However many practical applications do not need this property, they prefer the delegator can control on the times the proxy can re-encrypt.
Xu An Wang, Ziqing Wang, Yi Ding, Shujun Bai   +3 more
openaire   +1 more source

Hierarchical conditional proxy re-encryption

Computer Standards & Interfaces, 2012
In this paper, we introduce a new primitive called hierarchical conditional proxy re-encryption (HC-PRE) that enhances the concept of C-PRE by allowing more general re-encryption key delegation patterns. Hierarchical conditional proxy re-encryption (HC-PRE) scheme is the hierarchical extension of conditional proxy re-encryption (C-PRE) where the ...
Fang, Liming, Susilo, Willy, Ge, Chunpeng, Wang, Jiandong   +3 more
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Addressing Leakage of Re-encryption Key in Proxy Re-encryption Using Trusted Computing

2011
Proxy re-encryption is a cryptographic primitive enabling a proxy holding a re-encryption key to convert a ciphertext originally intended for Alice (delegator) into an encryption of the same message for Bob (delegatee). Proxy re-encryption is a useful tool, having many applications. However, we observe that the issue of re-encryption key leakage, where
Yanjiang Yang, Liang Gu, Feng Bao
openaire   +1 more source

Elliptic Curve Based Proxy Re-Encryption

Proceedings of the Second International Conference on Information and Communication Technology for Competitive Strategies, 2016
Proxy re-encryption is a scheme where a semi-trusted proxy alters the confidential message of one party into a confidential message of another party without knowing the original plaintext. To do the same, various approaches are suggested in the public key set up cryptography.
V. Thangam, K. Chandrasekaran
openaire   +1 more source