Research On Attribute-based Searchable Encryption In Vehicle Ad Hoc Network

The vehicle ad hoc network,when realizing the communication between vehicles and vehicles and between vehicles and people,applies a large number of interactive information technologies,thus providing users with better,more safe and efficient service experience.In order to protect the rights and privacy of service providers,the data stored on the cloud server is encrypted.However,encrypted data will hinder efficient search and fine-grained access,so searching for the required data from the massive encrypted data becomes a problem.The emergence of searchable encryption technology enables vehicle users to search data under ciphertext.However,the traditional searchable technology does not support fine-grained access.In order to overcome this problem,the searchable encryption based on attributes is proposed.This paper conducts an in-depth study on the attributes-based searchable encryption in the vehicle ad hoc network environment,including:(1)Aiming at the ciphertext search,access control and attribute revocation problems of non-secure data in vehicle ad hoc network,combining with attribute-based encryption technology and searchable encryption technology,attribute-based multi-keyword search encryption scheme supporting attribute revocation in the vehicle ad hoc network environment was proposed.Security analysis showed that the proposed schemes satisfied the indistinguishable under adaptive choice plaintext attack under based on the decisional q-bilinear Diffie-Hellman exponent assumption and satisfied the indistinguishable under adaptive selective keyword attack under based on the Discrete Logarithm assumption in the standard mode.The performance analysis showed that,the computational cost and communication cost of the proposed scheme in the encryption phase are higher than that of the known scheme,but in general,the proposed scheme has lower computational cost and communication cost compared with the known scheme.(2)Aiming at the ciphertext search,key distribution and data integrity problems existing in single-authority attribute-based encryption,combining with attribute-based encryption technology and searchable encryption technology,multi-authority attribute-based searchable encryption scheme in the vehicle ad hoc network environment is proposed.Security analysis showed that the proposed schemes satisfied the indistinguishable under adaptive choice plaintext attack under based on the decisional q-bilinear Diffie-Hellman exponent assumption and satisfied the indistinguishable under adaptive selective keyword attack under based on the Discrete Logarithm assumption in the standard mode.The performance analysis shows that,the computational cost and communication cost of the proposed scheme in the ciphertext stage are higher than the known schemes,but in general,the proposed scheme is more efficient than the known schemes.