Proxy Re-encryption Scheme based on the Timed-release in Edge Computing

A Timed-Release Proxy Re-Encryption Scheme

A Conditional Proxy Broadcast Re-Encryption Scheme Supporting Timed-Release

To allow a delegator not only to delegate the keyword-controlled decryption rights of a broadcast encryption to a set of specified recipients, but also to control when the decryption rights will be delegated, in this paper, for the first time, we introduce a new notion called TimedRelease Conditional Proxy Broadcast Re-Encryption (TR-CPBRE). We also propose a concrete construction for TR-CPBRE ...

Group-Based Proxy Re-encryption Scheme

Recently, proxy re-encryption scheme received much attention. In this paper, we propose a proxy re-encryption used for divert ciphertext from one group to another. The scheme is bidirectional and any member can independently decrypt the ciphertexts encrypted to its group. We discuss the security of the proposed scheme and show that our scheme withstands chosen ciphertext attack in standard model.

A Timed-Release Proxy Re-encryption Scheme and Its Application to Fairly-Opened Multicast Communication

Timed-Release Encryption (TRE) (proposed by May in 1993) prevents even a legitimate recipient decrypting a ciphertext before a semi-trusted Time Server (TS) sends trapdoor sT assigned with a release time T of the encryptor’s choice. Cathalo et al. (ICICS2005) and Chalkias et al. (ESORICS2007) have already considered encrypting a message intended to multiple recipients with the same release time...

On the Security of Group-based Proxy Re-encryption Scheme

Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext intended for Alice into a ciphertext for Bob without learning anything about the underlying plaintext. Chunbo Ma et al. have proposed a group based proxy re-encryption scheme to convert a ciphertext from one group to another. Any group member can independently decrypt the ciphertexts encrypted to its group. In their p...