A supervised privacy preservation transaction system for aviation business

Data security is a crucial issue for aviation business transaction. In order to prevent privacy leakage for the business participants, it is essential to construct a credible transaction environment. For this purpose, we construct a strict cryptographic scheme based on consortium blockchain that addresses two key perspectives. Firstly, an identity-based homomorphic scheme is proposed, so that the encapsulated transaction result can be correctly calculated and verified for the flowing amount. Secondly, the supervised function is incorporated to the homomorphic scheme. One more public key is added into the encryption trapdoor, and this key is assigned to the supervisor. Consequently, both the airline and the supervisor who work as the two recipients can independently decrypt the ciphertext without time-consuming interaction. Experimental results show that the system achieves encryption time of 15 ms, and decryption time is 15 ms and 15.45 ms for both recipients. Compared to the popular cryptocurrency schemes, the system significantly achieves the supervised function without compromising efficiency. Finally, the application network architecture is put forward for the supervised privacy preservation transaction system.