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Proxy re-encryption

About: Proxy re-encryption is a research topic. Over the lifetime, 708 publications have been published within this topic receiving 33624 citations.


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TL;DR: The concept of hybrid proxy re-encryption without key escrow is proposed, the new security model for this primitive is given, a scheme is constructed, and the results show that the schemes can have high level security with good efficiency.
Abstract: In proxy re-encryption, a proxy can transform a ciphertext computed under Alice’s public key into one that can be opened under Bob’s decryption key. In 2007, Matsuo proposed the concept of four types of proxy re-encryption schemes: CBE(Certificate Based Public Key Encryption) to IBE(Identity Based Encryption)(type 1), IBE to IBE(type 2), IBE to CBE (type 3), CBE to CBE (type 4). We observe that the proxy re-encryption from CBE to IBE scheme in Matsuo’s scheme inherits the key escrow problem from IBE. Is this necessary for proxy re-encryption from CBE to IBE? We give a negative answer. If we emphasis on the PKG’s involving in the re-encryption key generation, some interesting results can be obtained. We propose the concept of hybrid proxy re-encryption without key escrow, give the new security model for this primitive, construct such a scheme and prove its security. Furthermore, we construct the first proxy re-encryption scheme from from IBE to CBE, giving the security model for this new primitive and prove its security. At last, we compare our schemes with other related schemes, the results show that our schemes can have high level security with good efficiency.
Journal ArticleDOI
TL;DR: Wang et al. as discussed by the authors proposed a certificate-based proxy re-encryption plus (CBPRE+) scheme based on CBRE and message-level fine-grained controllable and non-transferable PRE+.
Abstract: The sharing of medical data is crucial for advancing medical research, but the risk of sharing medical data with malicious users poses a significant problem for smooth sharing among medical institutions. To address this issue, we propose a certificate-based proxy re-encryption plus (CBPRE+) scheme based on certificate-based proxy re-encryption (CBPRE) and message-level fine-grained controllable and non-transferable proxy re-encryption plus (PRE+). This scheme allows medical organizations to securely distribute their encrypted data to recipients through public cloud storage. The proposed scheme maintains the benefits of CBPRE, while additionally enabling fine-grained message-level sharing and non-transferability. This ensures that user data is only available to authorized health services, thereby preventing malicious disclosure. We validate and analyze the correctness, safety, and performance of our scheme, and our results show that the scheme has chosen-ciphertext security for the original ciphertext and chosen-plaintext security for the re-encrypted ciphertext. Our proposed scheme offers more advantages than the existing CBPRE scheme.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202336
202275
202147
202059
201959
201869