云计算与区块链平台的遥感影像安全检索方案

遥感影像外包到半可信的云平台进行存储和检索时，可能导致影像数据的泄露和返回不完整的检索结果。加密可以保护影像数据的安全，但无法保证云平台提供真实、完整的存储和检索服务。区块链技术能有效保证存储和检索服务的真实性和完整性，但区块链的计算和存储能力有限，如何实现遥感影像的安全存储和检索仍是一个具有挑战性的问题。该文提出一种结合云平台和区块链的遥感影像安全检索方法，将影像哈希等轻量级数据存储于区块链，云平台存储海量加密影像数据，确保云存储影像的真实性；区块链执行基于遥感影像属性的检索，在此基础上由云平台执行复杂度较高的基于内容的安全检索，保证了检索结果的完整性；利用区块链技术设计遥感影像检索交易机制。实验表明方案可以实现安全、真实、完整和高效的遥感影像检索，并构建一个双方信任的公平交易环境。

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.