Ciphertext policy attribute-based proxy re-encryption

Abstract

We present a novel ciphertext policy attribute-based proxy re-encryption (CP-AB-PRE) scheme. The ciphertext policy realized in our scheme is AND-gates policy supporting multi-value attributes, negative attributes and wildcards. Our scheme satisfies the properties of PRE, such as unidirectionality, non-interactivity and multi-use. Moreover, the proposed scheme has master key security, allows the encryptor to decide whether the ciphertext can be re-encrypted and allows the proxy to add access policy when re-encrypting ciphertext. Furthermore, our scheme can be modified to have constant ciphertext size in original encryption. © 2010 Springer-Verlag.