Secure Remote Sensing Image Retrieval Scheme Based on Cloud Computing and Blockchain Platforms

Remote sensing image storage and retrieval outsourcing to a semi-trusted cloud platform may lead to image data leakage and return incomplete retrieval results. Although encryption can protect the security of image data, it can not ensure that the cloud platform provides accurate and complete storage and retrieval services. Blockchain technology guarantees the authenticity and integrity of storage and retrieval services, but the computation and storage capacity of blockchain are limited, which makes it a challenging problem to realize secure storage and retrieval of remote sensing images. This paper proposes a secure remote sensing image retrieval scheme based on blockchain and cloud computing platforms. To secure the validity of cloud-saved images, the image hash and lightweight data are first stored on the blockchain, while the cloud platform stores huge encrypted image data. Moreover, the blockchain performs attribute-based retrieval of remote sensing images, and the cloud platform performs content-based secure retrieval to ensure the integrity of the retrieval results. Finally, the remote sensing image retrieval transaction mechanism is designed using blockchain technology. The experiments show that the proposed scheme can achieve secure, reliable, and fair remote sensing image retrieval, enabling both trading sides to benefit from a high-trust and fair-trading environment.