Abstract: In order to improve the performance of privacy protection in hybrid cloud environment, to ensure the information security and privacy data, proposes a privacy protection model based on elliptic curve cryptography. The structural information model of privacy protection arithmetic encoding hybrid cloud environment in elliptic curve cryptography, process optimization combination of elliptic curve equation of public key encryption end the main key structure search, privacy protection data encryption, identity authentication scheme with threshold cryptography, the symbols are detected in the mixed frequency link layer cloud platform, build the private key sharing scheme, bilinear cyclic shift method to restore the user's private key to achieve privacy protection. The simulation results show that the encryption method for user privacy protection, data the anti attack performance of encryption is better, higher credibility.