Results 231 to 240 of about 19,760 (270)

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

Improved Attribute Proxy Re-encryption Scheme

2021
With the development of cloud computing, storing and sharing medical data in the cloud is envisioned as a promising method for supporting a large scale of users. However, if the sensitive information contained in the medical data (e.g., prescribed drug) is leaked, the user privacy will be damaged.
Wang Zhan, Yuling Chen, Wei Ren, Xiaojun Ren, Yujun Liu   +4 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

Certificateless Proxy Re-Encryption Without Pairing

Proceedings of the 3rd International Workshop on Security in Cloud Computing, 2015
Proxy Re-Encryption was introduced by Blaze, Bleumer and Strauss to efficiently solve the problem of delegation of decryption rights. In proxy re-encryption, a semi-honest proxy transforms a ciphertext intended for Alice to a ciphertext of the same message for Bob without learning anything about the underlying message.
Akshayaram Srinivasan, C. Pandu Rangan
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

Multi-Use Conditional Proxy Re-encryption

2013 International Conference on Information Science and Cloud Computing Companion, 2013
In this paper a scheme named multi-use conditional proxy re-encryption based on ECC is proposed first, which can be used in the following email service scenarios: Alice can delegate her decryption rights to Bob for an encrypted mails sent to her, which contains a specific word and satisfies the condition set on the proxy by Alice, and Bob also can ...
Lequn Mo, Guoxiang Yao
openaire   +1 more source

Multi-Use Unidirectional Proxy Re-Encryption

2011 IEEE International Conference on Communications (ICC), 2011
This paper presents the first multi-use unidirectional proxy re-encryption scheme proven-secure against chosenciphertext attacks and collusion attacks in the standard model. Although our proposal features a linear ciphertext size and decryption time in the number of translations, we emphasize that it is the first multi-use and unidirectional ...
Jun Shao, Peng Liu, Zhenfu Cao, Guiyi Wei   +3 more
openaire   +1 more source

Re-Encryption Verifiability: How to Detect Malicious Activities of a Proxy in Proxy Re-Encryption

2015
In this paper, we introduce a new functionality for proxy re-encryption (PRE) that we call re-encryption verifiability. In a PRE scheme with re-encryption verifiability (which we simply call verifiable PRE, or VPRE), a receiver of a re-encrypted ciphertext can verify whether the received ciphertext is correctly transformed from an original ciphertext ...
Satsuya Ohata, Yutaka Kawai, Takahiro Matsuda, Goichiro Hanaoka, Kanta Matsuura   +4 more
openaire   +1 more source

Identity-Based Conditional Proxy Re-Encryption

2011 IEEE International Conference on Communications (ICC), 2011
This paper proposes a new cryptographic primitive, named identity-based conditional proxy re-encryption (IBCPRE). In this primitive, a proxy with some information (a.k.a. re-encryption key) is allowed to transform a subset of ciphertexts under an identity to other ciphertexts under another identity.
Jun Shao, Guiyi Wei, Yun Ling, Mande Xie
openaire   +1 more source

Proxy re-encryption with keyword search

Information Sciences, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shao, Jun, Cao, Zhenfu, Liang, Xiaohui, Lin, Huang   +3 more
openaire   +2 more sources