In recent years, the proliferation of blockchain technology has opened many research directions. In this context, the combination of blockchain-based techniques and traditional methods to improve existing systems has received significant interest from researchers. In this paper, we present a decentralized storage and sharing system based on a combination of IPFS (Inter-Planetary File System), encryption technologies (including Advanced Encryption Standard (AES), Elliptic Curve Cryptosystem (ECC), ABE (Attribute-based Encryption), Multi-Authority ABE (MA-ABE)), and multichain. In particular, we facilitate the advantages of the IPFS network to store user's data in a distributed manner. Furthermore, we make use of a cryptographer to protect the privacy of data. The hash returned by the IPFS network will be stored in our multichain architecture to provide transparency for all users participating in the system. To the best of our knowledge, it is the first storage and sharing system using IPFS, cryptographer, and multichain to ensure decentralized, trustworthy, transparent characteristics for storing and sharing data.