A Chosen-Ciphertext Secure Fuzzy Identity-Based Proxy Re-Encryption Scheme

Chosen-Ciphertext Secure Certificateless Proxy Re-Encryption

In this paper we introduce the notion of certificateless proxy re-encryption and also give precise definitions for secure certificateless proxy re-encryption schemes. We present a concrete scheme based on bilinear pairing, which enjoys the advantages of certificateless public key cryptography while providing the functionalities of proxy re-encryption. Moreover, the proposed scheme is unidirecti...

Chosen Public Key and Ciphertext Secure Proxy Re-encryption Schemes

A proxy re-encryption scheme enables a proxy to re-encrypt a ciphertext and designate it to a delegatee. Proxy re-encryption schemes have been found useful in many applications, including e-mail forwarding, law-enforcement monitoring, and content distribution. Libert and Vergnaud presented the first construction of unidirectional proxy re-encryption scheme with chosen ciphertext security in the...

Chosen-Ciphertext Secure Proxy Re-encryption without Pairings

Proxy re-encryption (PRE), introduced by Blaze, Bleumer and Strauss, allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into an encryption of the same message intended for Bob. Proxy re-encryption has found many practical applications, such as encrypted email forwarding, secure distributed file systems, and outsourced filtering of encrypted spam. In ACM CCS’07, Ca...

Chosen-ciphertext secure multi-hop identity-based conditional proxy re-encryption with constant-size ciphertexts

Chosen-Ciphertext Secure Proxy Re-Encryption Schemes without Pairings

Proxy re-encryption realizes delegation of decryption rights, enabling a proxy holding a re-encryption key to convert a ciphertext originally intended for Alice into an encryption of the same message for Bob. Proxy re-encryption is a very useful primitive, having many applications in distributed file systems, outsourced filtering of encrypted spam, access control over network storage, and so on...