来源：INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE
出版年：2020
卷：31
期：5
页码：551-567
DOI：10.1142/S0129054120500252
关键词：Deterministic public key proxy re-encryption; auxiliary inputs;; lattices; learning with error
摘要：Proxy Re-Encryption (PRE) is a cryptographic primitive that allows a proxy to turn an Alice's ciphertext into a Bob's ciphertext on the same plaintext. All of the PRE schemes are public key encryption and semantic security. Deterministic Public Key Encryption (D-PKE) provides an alternative to randomized public key encryption in various scenarios where the latter exhibits inherent drawbacks. In this paper, we construct the first multi-use unidirectional D-PRE scheme from Lattices in the auxiliary-input setting. We also prove that it is PRIV1-INDr secure in the standard model based on the LWR. Finally, an identity-based D-PRE is obtained from the basic construction.
