隨著網際網路以及行動裝置的普及化，人們對於多媒體的呈現以及接收方式已經 不再像是由傳統電視媒體單方面接收資訊。因為接收資訊的方式改變，逐漸地有新型 態的工作模式，例如自媒體的行業產生。不幸的是，目前的多媒體分享平台多為集中 式的平台，在中心化的架構往往會產生利益及權益上的糾紛。因此，如何有效且公平 地分享影像成為一個重要的議題。本文提出了一個建置去中心化的多媒體分享平台的 解決方案，透過結合星際檔案系統(Inter-Planetary File System）與區塊鏈的技術。為了 保護影像存取的隱私，本系統採用了基於屬性的加密作為存取控制的方法。這種方法 可以同時降低加解密時所需要的傳輸成本。另外透過分散式的區塊鏈預言機擔任資料 授權者的角色，以代理重新加密的概念，來降低資料擁有者的在線限制。;With the popularity of the Internet and mobile devices, people no longer rely solely on traditional television media for the presentation and reception of multimedia content. As the ways of receiving information have changed, new forms of work patterns, such as the emergence of self-media industries, have gradually emerged. Unfortunately, existing multimedia-sharing platforms are mostly centralized, and centralized architectures often lead to disputes over interests and rights. Therefore, effectively and fairly sharing media content has become an important issue. In this paper, we propose a scheme to build a decentralized multimedia-sharing platform by combining the Inter-Planetary File System (IPFS) and blockchain technology. To protect the privacy of file access, the system adopts attribute-based encryption as the access control method. This approach can simultaneously reduce the transmission costs required for encryption and decryption. Additionally, by employing distributed blockchain oracles as data authorizers and introducing the concept of proxy re encryption, the system mitigates the online restrictions faced by data owners.
