A verifiable hidden policy CP‐ABE with decryption testing scheme and its application in VANET

Abstract

AbstractAs a new kind of cryptographic primitive, attribute‐based encryption (ABE) is widely used in various complex scenarios because it has the characteristic of access control while encrypting messages. However, the existing ciphertext policy ABE (CP‐ABE) encryption schemes have some inherent defects, such as the lack of privacy‐preserving and inefficient decryption. These weak points make them difficult to play a role in scenarios with high real‐time and high data confidentiality requirements, for example, vehicle ad hoc network (VANET). Therefore, we proposed a verifiable hidden policy CP‐ABE with decryption testing scheme (or VHPDT, for short). It has the following features: hidden policy to privacy‐preserving and outsourced decryption testing can verify the correctness of the decrypted result. Furthermore, we apply it into VANET.