Secure document sharing model based on blockchain technology and attribute-based encryption

Various cryptographic approaches have been used to resolve concerns about data privacy shared in public cloud storage, assuming that the cloud service provider is trustworthy. However, the necessity to disseminate papers has just emerged. Regarding digital document sharing, the current cloud-based models are successful but have a few downsides. Two significant problems are the high cost of computing and external interference. Blockchain technology and keyword-searchable attribute-based encryption (ABE) are proposed in this study as secure and efficient means of transferring digital certificates, addressing the abovementioned issues. The blockchain records transactions, while the Interplanetary File System (IPFS) stores encrypted data to ensure privacy and immutability. The paradigm also has the added benefits of low computational costs and the ability to revoke attributes. In addition, a smart audit contract is developed to manage who may see certain documents. We then put the model through its paces on the Ethereum network and compared its results to the state of the art. The results of experiments and theoretical analyses are more applicable and practical in challenging settings. Furthermore, security analysis demonstrates that the proposed paradigm is immune to attacks based on guessing keywords and "chosen plaintext" (CPA).